Rice Lake Survivor SR2411-SC-60 User manual

S E R I E S
TRUCK SCALES
SR & EZ
Vehicle Scale
Handbook
Toughest
Truck Scales
On Earth.
45700

Preface
How to use this Vehicle Scale Handbook
This handbook is an aid to help you in making a truck scale presentation on the SURVIVOR series vehicle
scales.
This booklet is divided into sections devoted to specific truck scale concerns and needs.
Introduction: Planning a truck scale installation
US State and Canadian Province truck size and weight regulations
Scale information: Weighbridge structure
Wiring, Electronics, and Lightning Protection
Site information: Foundation requirements
State Weights and Measures agencies
Installation information: Recommended equipment (SR series)
Recommended equipment (EZ series)\
Engineering details: Specifications sheets (SR and EZ series)
Engineering reference quote sheet (SR and EZ series)
Quotation Form
Warranty: Vehicle scale warranty
Shipping and Scheduling: Shipping Guidelines for SR series
Shipping Guidelines for EZ series
Simplified Buyers Guide: Questionnaire pullout section for the truck scale buyer
Drawing Package 70’x14’ 100-ton SR Concrete Deck Scale and foundation options
By reviewing this booklet, you will be better equipped to make an informed decision on what is a very
expensive and long-term investment.
Should you have any questions concerning this booklet or other scale-related issues, please call Rice Lake
Weighing Systems at [phone].
© 1998 Rice Lake Weighing Systems, Inc. Rice Lake, WI USA. All Rights Reserved.
RICE LAKE WEIGHING SYSTEMS • 230 WEST COLEMAN STREET • RICE LAKE, WISCONSIN 54868 • USA

Contents
Planning a Truck Scale Installation .................................................................................................. 1
US State and Canadian Province Truck Size and Weight Regulations .......................................... 3
Scale Information ............................................................................................................................... 7
Weighbridge Structure .................................................................................................................... 7
Concentrated Load Capacity (CLC) ......................................................................................... 7
Federal Bridge Standards “r” factor ......................................................................................... 7
Span Deflection Ratio............................................................................................................... 8
Truck Scale Grounding and Lightning Protection.......................................................................... 9
Lightning and Transient Protection Options........................................................................... 10
Lightning Protection Extended Warranty Coverage............................................................... 11
Lightning Protection Extended Warranty Inspection Document............................................ 12
Electrical Conduit Requirements for Scale Wiring ...................................................................... 13
Site Information and Foundation Specifications ........................................................................... 14
Overview ...................................................................................................................................... 14
Soil Bearing Capacity............................................................................................................. 14
Deviation from Published Specifications ............................................................................... 14
Concrete Sampling ................................................................................................................. 14
Concrete, Rebar, and Mesh Requirements ................................................................................... 15
Foundation and Deck Material for 11' SR-Series Scales........................................................ 15
Foundation and Deck Material for 12' SR-Series Scales........................................................ 16
Foundation and Deck Material for 14' SR-Series Scales........................................................ 17
Checklist of Foundation Questions .............................................................................................. 18
State Weights and Measures Directors ......................................................................................... 19
Installation Information................................................................................................................... 25
SR Series Assembly Overview .....................................................................................................25
Scheduling and Labor Guidelines for SR-Series Installation................................................. 25
Recommended Equipment and Tools ..................................................................................... 25
EZ Series Assembly Overview .....................................................................................................26
Scheduling and Labor Guidelines for EZ-Series Installation................................................. 26
Recommended Equipment and Tools ..................................................................................... 26
Engineering Details .......................................................................................................................... 27
SR-Series Engineering Specifications Sheet ................................................................................ 27
SR-Series Specifications .............................................................................................................. 29
Standard Equipment Supplied by RLWS ............................................................................... 29
Distributor-Supplied Equipment............................................................................................. 29
EZ-Series Engineering Specifications Sheet ................................................................................ 31
EZ-Series Specifications............................................................................................................... 33
Standard Equipment Supplied by RLWS ............................................................................... 33
Distributor-Supplied Equipment............................................................................................. 33
Truck Scale Pricing with Options................................................................................................. 35
Continued

Vehicle Scale Limited Warranty...................................................................................................... 36
Vehicle Scales Labor and Travel Reimbursement Program ......................................................... 37
Labor and Mileage Claims under Vehicle Scale Limited Warranty ....................................... 37
Parts Replacement under Vehicle Scale Limited Warranty .................................................... 37
Shipping and Scheduling Guidelines ..............................................................................................38
SURVIVOR SR Shipping............................................................................................................. 38
SURVIVOR EZ Shipping............................................................................................................. 38
Truck Scale Buyer’s Questionnaire ................................................................................................ 39
Application Specifics.................................................................................................................... 39
Site Selection Specifics ................................................................................................................ 39
Foundation Specifics .................................................................................................................... 40

1
Planning a Truck Scale Installation
A vehicle scale is a major investment and probably represents one of the most expensive weighing
systems you will ever buy. With that expense in mind, the decision must be founded in long-range plan-
ning that takes into account all present and likely future uses of the scale system. Ideally, a qualified
project engineer familiar with your industry should analyze your company's needs and write specifica-
tions for a comprehensive solution to meet those needs. Alternately, you can do your own analysis, then
write your own specifications before purchasing a vehicle scale. Whichever method you choose to
transfer your needs to a written specification, the variety of information needed may surprise you.
The comprehensive information you need to compile a “system” specification must normally be sought
from several sources. The purpose of this handbook is to provide you with some of the hard-to-find
information required, and to help you discover the right questions to ask. Only by asking the hard ques-
tions will you eventually find the best solutions for all aspects of your total vehicle weighing system.
The following questions will help you discover and organize the information needed to make informed,
long-range decisions and find the best solutions for the complete vehicle-weighing system.
Capacities
1. What type of trucks will be weighed? Single-axle? Dual-axle? Tri-axle?
What are the maximum axle loads of each type expected?
2. How long should the weighing platform be for current and future needs?
What is the maximum legal truck/trailer combination length in your state?
3. How many weighments are expected per day?
4. Are axle weights necessary, or only gross vehicle weights?
5. What is the maximum total weight expected to be weighed on the scale?
What is the minimum total weight expected to be weighed on the scale?
Site Location
6. What approach length is required by NTEP? Is there sufficient room?
7. Will existing traffic patterns at the site interfere with the vehicle scale?
8. Will high groundwater or even occasional flooding create a possible problem?
9. Is there abnormal RFI/EMI noise at the site?
10. Is the site located within a hazardous environment?
11. Will you possibly want to relocate the scale in future years?
12. Are soil-bearing characteristics acceptable without major excavation and fill?
13. Will underground utilities need to be rerouted from the site?
14. Is there construction and maintenance access to both or only one side of the scale?

2
Life Cycle and Warranty Considerations
15. The heart of a vehicle scale is the weighbridge. How long is the weighbridge warranty?
16. How much does the deck bend under a maximum legal highway load on tandem-axle spacing?
17. What is the “r” factor of the weighbridge compared to Federal Bridge Standards?
Load Cells and Suspension
18. Are load cells NTEP-approved for legal-for-trade applications?
19. Are load cells sized at 75,000 lbs to protect against accidental overload?
20. Are stainless steel, hermetically-sealed load cells needed for chemical or water contact?
21. Are load cell mount suspension systems self-checking and self-centering?
22. How long is the standard load cell warranty?
23. Is extended warranty lightning insurance available and needed for load cells?
The following map of thunderstorm frequency may be helpful in answering this question.
Average Days of Thunderstorm Activity in US
Zone 2
15 – 34
Zone 1
Less than 14 Zone 4
55 – 74
Zone 3
35 – 54 Zone 5
More than 74
WI
MN
ND
SD
NE IA
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
VA
PA
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
WV
NC
NV
OR
WA
ID WY
UT
NM
CO
AZ
MT
NY
The following maps will aid you in determining State and Provincial vehicle standards. The information
on the maps was current as of 1997.

3
Tandem Axle Maximum Weights by State
AK 38,000
CO 36,000 (40,000)
CT 36,000
DE (40,000)
DC 38,000
FL 44,000
GA **
ID (37,800)
NH ** Formula B if GCW
over 73,280 lbs.
Over 34,000 lbs.
** — Limited to 34,000 lbs.if GCW exceeds 73,280 lbs.
34,000 lbs
(Figures in parentheses represent non-interstate highway limits where
different from interstate.)
NM 34,320
NY (36,000) Formula B if
GCW over 71,000 lbs.
NC 38,000
PA **
RI 36,000
SC 35,200 if GCW under
75,185 (39,600)
WY 36,000
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
P — Permit required
D — Designated highways
LCVs — Longer combination vehicles
S — State authorized routes
T — Combinations with tridem
(Figures in parenthesis represent non-
interstate highway limits where they
differ from interstate limits.)
AK Formula B
AL (84,000) T
AZ LCVs - 129,000 PD Formula B
CO LCVs - 110,000 PD Formula B;
(85,000)
HI (88,000)
ID LCVs - 105,500 P Formula B
IL (73,280)
KS (85,500)
LA 83,400 T ;(88,000 T )
ME 100,000 T ;(100,000 T )
MA LCVs - 127,400 PD Formula B
MI 164,000 requires 11 axles; 80,000
on five axles
MN (73,800) D
MO (73,280)
MT LCVs - Formula B, P
NE LCVs - 95,000 P Formula B
NV LCVs - 129,000 P
NH (99,000 T )
NM 86,400
ND LCVs - 105,500 P Formula B
OK LCVs - 90,000 P
OR LCVs - 105,500 PD Formula B
SC (80,600)
SD LCVs - 129,000 P Formula B
UT LCVs - 129,000 P Formula B
WA LCVs - 105,500 P Table B
WY 117,000 Formula B
Maximum Weights Highway Combinations by State
80,000 lbs. maximum
for interstate highways Over 80,000 lbs. (For specific conditions see
information below.)
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
State and Provincial Truck Size and Weight Regulations

4
Tractor & Semi-Trailer Maximum Combination Lengths by State
AK 70 ft.
AZ 65 ft. if semi trailer exceeds 53 ft.
CA 65 ft.; 40 ft. KP ; 38 ft. KP single
rear axle
CO 70 ft. if semi trailer exceeds 57 ft.,
4 in.
DE 60 ft.
DC 55 ft.
GA 60 ft.; 67-1/2 ft. S 41 ft. KP
HI 60 ft.
IL 55 ft.
IN 40-1/2 ft. KP if trailer exceeds
48-1/2 ft.
MN 75 ft.
MO 60 ft.
MT 75 ft.
NV 70 ft.
NM 65 ft. if semi trailer exceeds 57-1/2 ft.
NC 60 ft.
ND 75 ft.; 88 ft. S
OR 60 ft.; 65 ft. S
PA 60 ft.
VA 60 ft.
WY 60 ft.; 55 ft. S
S — State authorized routes
KP — Kingpin to center rear axle controls
(Off the National Network)
P
— Permit required
Under 65 ft. Over 65 ft. Trailer limits only
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
65 ft.
Maximum Width by State
HI 108 inches
102 inches on
interstate and
designated highways
All highways
102 inches
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
Data subject to change; please consult individual state Department of Transportation agency for latest data.

5
Multiple Trailer Units Maximum Combination Lengths by State
ID — Interstate and designated highways
(national system)
S — State authorized routes
(Off the National Network)
P — Permits required
T — Toll road/turnpike
TL — Trailer limits
Not permitted 65 ft. Over 65 ft. Trailer limits only
AK 75 ft.; 95 ft. P
AZ TL ; 105 ft. permits required on 1-15
CA 75 ft.
CO TL ; 70 ft. overall if trailer limits
exceeded
ID 105 ft. P ; TL 75 ft. overall if trailer/
connector/trailer exceeds 61 ft.
IN TL; T
MA Twin 48 ft.trailers T
MI 58 ft. S if trailer limit exceeded
MO 65 ft. S
NV TL; 105 ft. P ;if trailer limits exceeded,
overall length is 70 ft.
NY 114 ft. T
ND 75 ft.; ID 110 ft; 88 ft. S
OH TL ;90 ft. T
OK TL ; (three at 20 ft. each P )
OR 60 ft. TL ;68 ft. ID
PA 85 ft. T
SD TL ; 81-1/2 ft. (sum of trailers plus
towbar)
WA TL ; 61 ft.; 68 ft. P
WY 81 ft. TL
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
Truck & Full Trailer Maximum Combination Lengths by State
AL 53-1/2 ft.
AK 75 ft.
CO 70 ft.
CT 60 ft.
DC 55 ft.
DE 60 ft.
GA 60 ft.
ID 75 ft.
IL 60 ft.
IN 60 ft.
MD 55 ft.; 60 ft. D
MA 60 ft.
MI 59 ft.; 65 ft. D
MN 75 ft.
Under 65 ft. Unit limits
apply
D — Designated highways include legal tolerances
Over 65 ft.
MO 55 ft.; 65 ft. D
MT 75 ft.
NV 70 ft.
NJ 62 ft.
NC 60 ft.
ND 75 ft.; 88 ft. D
OK 70 ft.
OR 75 ft.
PA 60 ft.
SD 80 ft.
VT 60 ft.
WA 75 ft.
WV 60 ft.
WY 60 ft.
65 ft.
WI
MN
ND
SD
NE IA
MT
WY
CO
NM
UT
AZ
NV
OR
WA
ID
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
NC
VA
WV
PA
NY
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
Data subject to change; please consult individual state Department of Transportation agency for latest data.

6
Canadian Provinces Vehicle Sizes & Weights
In 1988,all Canadian provinces signed a Memorandum
of Understanding (MOU) establishing uniform size and
weight limits for common vehicle configurations. A
vehicle obeying the size and weight specifications of the
MOU is legal across all Canadian provinces. However,indi-
vidual Canadian provinces retain the right to establish
Length Limits (All measurements in meters)
Overall Height...............................................................4.15
Overall Width..................................................................2.6
Overall Length
Straight Truck .......................................................12.5
Truck & Full Trailer.................................................23
Truck & Pony Trailer ...............................................23
Tractor Semi-Trailer..................................................23
A Train Double.........................................................25
B Train Double ........................................................25
C Train Double.........................................................25
Trailer Length
Full Trailer.............................................................12.5
Semi-Trailer ...........................................................16.2
Box Length
Truck & Full or Pony Trailer ...............................18.5
A Train Double......................................................18.5
B Train Double ........................................................20
C Train Double.........................................................20
Wheelbase
Truck...........................................Not restricted
Tractor (min)..................................................3
Tractor (max)..............................................6.2
Full Trailer (min) ........................................6.5
Semi-Trailer (max) ....................................12.5
Semi-Trailer (min).......................................6.5
Weight Limits (All measurements in kilograms)
Gross vehicle weight
Truck – 3 axles ...............................................22,500
Truck-tandem/tandem........................... Not Permitted
Truck & Pony – 6 axles..................................43,500
Truck & Full – 5 axles ...................................39,500
Truck & Full – 7 axles ...................................53,500
Tractor Semi-Trailer – 3 axles ........................23,700
Tractor Semi-Trailer – 4 axles ........................31,600
Tractor Semi-Trailer – 5 axles ........................39,500
Tractor Semi-Trailer – 6 axles ........................46,500
A Train – 5 axles ............................................39,700
A Train – 6 axles ............................................47,600
A Train – 7 axles ............................................53,500
A Train – 8 axles ............................................53,500
Second Trailer Weight (max)............................16,000
B Train – 5 axles............................................40,700
B Train – 6 axles............................................48,600
B Train – 7 axles............................................56,500
B Train – 8 axles............................................62,500
C Train – 5 axles ............................................41,900
C Train – 6 axles ............................................49,800
C Train – 7 axles ............................................54,600
C Train – 8 axles ............................................58,500
Second Trailer Weight (max)............................21,000
Axle loads
Steering Axles............................................ 5,500
Single Axle – dual tires........................... 9,100
Tandem 1.2m spread.............................. 17,000
Tandem 1.8m spread.............................. 17,000
Tridem 2.4m spread............................... 21,000
Tridem 3.0m spread............................... 23,000
Tridem 3.7m spread............................... 24,000
Triaxle 1.5m + 2.5m.................Not permitted
Triaxle 1.8m + 3.0m.................Not permitted
limits that are more liberal than the specifications
of the MOU.Following are the limits established for
the MOU.

7
Scale Information
Weighbridge Structure
Comparing truck scale application capacities can be confusing. Different manufacturers highlight differ-
ent values in their sales, engineering, and service documents, which can be perceived as the same thing -
even when they are not. For example, the Concentrated Load Capacity (CLC) and “r” factor ratings
(from Federal Bridge Standards) are often perceived as a method of determining the strength of a weigh-
bridge. This is a common misunderstanding that leads to confusion about judging weighbridge strength.
Concentrated Load Capacity (CLC)
The CLC rating resulting from an NTEP test is only a measurement of how well the load cells (and load
cell suspensions) react to large loads placed on the scale deck in a 4' x 10' area. The 4' x 10' loading area
is generally in the middle of an unsupported span to simulate an actual live load bearing on tandem truck
axles. When a CLC load is applied to the weighbridge during an NTEP test, the NTEP tester records the
displayed weight. If the scale falls within acceptance testing tolerances, the scale has that CLC weight
value recorded as the CLC on the Certificate of Conformance.
The CLC rating is not a measure of weighbridge strength or rigidity, because weighbridge deflection is
not measured in the NTEP test. It is irrelevant if the loaded weighbridge sags 1/10th of an inch, or 10
inches, as long as the scale weighs within the acceptance tolerance. The scale’s CLC weight rating passes
in either case. A high CLC rating could be given to an extremely flexible deck sitting on load cell mounts
which were capable of accurately handling the side loading resulting from a severely sagging weigh-
bridge.
Federal Bridge Standards “r” factor
The “r” factor is a better method of determining a weighbridge’s carrying capacity. Again there are
variables that will modify the rating of the scale, such as the number of axles and axle spacing. The “r’
factor is a method of determining acceptability of a roadway bridge to carry expected loads. Since a truck
scale is similar to the unsupported span of a bridge structure, this type of rating has validity as an indica-
tion of weighbridge strength in a vehicle scale.
Table B of the Federal Bridge Gross Weight Formula in NIST Handbook 44 is referenced in determining
“r” factors. This table assigns the maximum legal highway load (34,000 lbs) bearing on a dual tandem
axle (axles 4' apart) as a reference value of 1. This value of 1 for a bridge span assumes a large safety
factor is built into the bridge as a safeguard against catastrophic failure. Bridges designed for loads other
than 34,000 lbs on 4' axle spacing are assigned an “r” factor by simple division.A bridge designed for a
17,000 lbs load on 4' axle spacing would be assigned a 0.5 “r” rating, and one designed for 68,000 lbs on
that same spacing would be assigned a 2.0 rating.
Some scale manufacturers have advocated adopting this concept for rating the unsupported spans of
vehicle scales. If a truck scale manufacturer designs a scale for a 60,000 lb load on 4' tandem axle spac-
ing, the “r” factor for that scale would then be 1.76.
The SURVIVOR®SR series scale decks, designed for a 90,000 lb load on a 4' tandem axle spacing, rate a
2.65 “r” factor, one of the highest in the truck scale industry.
It is important to remember that the manufacturers set the amount of weights used in NTEP testing for
their scales, and the total is directly related to the CLC assigned to the scale. Because the CLC does not
measure weighbridge deflection, neither then does the “r” factor calculated from the CLC. While a large
“r” factor may indicate the ability of a structure to handle a certain load without catastrophic failure, it
does not address the effects of repeated flexing on ultimate weighbridge life. While a significant deck
deflection might not collapse a scale, it will certainly shorten the useful life cycle of a weighbridge if
repeated frequently enough.

8
Besides not addressing deck deflection, the “r” factor is of limited use for certain applications with
vehicles not designed for travel on highways. Most problems of truck scale suitability are for trucks that
do not typically travel on highways. For example, the Rice Lake Weighing Systems SURVIVOR series
trucks scales (and their foundations) have been designed for a 90,000 lb 4' tandem axle load, hence their
“r” factor is 2.65. The trucks that are most often the biggest problem for vehicle scales are mining trucks
not limited by legal highway load limits. These vehicles may have a single large axle that usually exceeds
34,000 lbs on that single axle, and may exceed 90,000 lbs. Bridge formula table “B” does not address this
type of single-axle loading configuration.
Span Deflection Ratio
The best method of determining weighbridge strength is the one chosen by the railroads many years ago.
This is the standard span deflection ratio for railroad scale decks at a specific load. As an example, a
railroad weighbridge should not deflect more than 1/1200 of the span distance. A 20' span (240") should
not deflect more than 0.2" (1/1200 x 240") when loaded to the maximum load that the scale will see (for
railroad track scales, E-80 equals 80,000 lb loads every 5 feet along the scale).
Deflection in this case is defined as a ratio of span to the overall deflection of the weighbridge when
loaded in the worst-case position on the weighbridge with the highest designed load (CLC or dual axle
loads).
The SURVIVOR siderail truck scale (SR-series) deflects no more than 1/900 at its rated load of 90,000
lbs on 4' axle spacing (CLC rating and dual axle load rating are considered the same for this calculation).
This means that the scale weighbridge will not deflect more than 0.27" over a 20-foot span. The less
deflection, the less bending stress in the weighbridge and the longer the life cycle. The figure below is
exaggerated to illustrate span deflection action.
Typical truck scales deflect 1:500 – 1:600 SURVIVOR SR truck scales deflect only 1:900
This final piece of the puzzle, long term life cycles, is critical when looking at a truck scale purchase.
Summary
We have three methods of reviewing a truck scale:
•CLC to determine weighing accuracy,
•“r” factor for the methods of loading, and
• span deflection ratio for comparing deflection and the life cycle of competitive truck scales.
Each is important, each is a valuable measuring method, and each provides a unique perspective to the
end user making a decision to purchase a vehicle scale.
a
a a
a a a a
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a
a a
a a a a
aa a

9
Truck Scale Grounding and Lightning Protection
As a general rule, always strive for a single-point grounding system. Do not drive ground rods at the scale
location and establish a separate earth ground for the scale. This separate earth ground may not share the
same zero reference as the existing earth ground for the AC power system. This difference in electrical
potential invites ground-loop current flow between the two grounds, often corrupting data communication
like RS-232 which depends on a stable zero reference.
In addition, a separate earth ground system at the scale can actually invite lightning damage!
• A minor powerline surge in the scale house electrical supply should immediately be shunted to
ground. If a separate ground system exists at the scale with a lower potential than the main
ground, the surge may travel out to the scale ground, possibly damaging load cells en route.
• A nearby lightning ground strike may instantly raise the zero potential of a ground rod at the scale
location, while leaving the scale house ground rod affected less. That lightning surge will now
take the easiest path to the lower-potential ground—through the scale wiring and back to the scale
house ground, possibly damaging the indicator en route.
Therefore, we believe the best grounding system for the scale is the same grounding system used for the
incoming AC power system. The 120 VAC power source used to power the indicator will be connected to
an existing earth-grounded rod at the service panel of the scale house or other building where the indica-
tor is located. This earth ground must consist of a double ground rod system of two 5/8" x 8' copper rods
driven 8' deep at the service entrance where the local utility company brings their lines into the building.
The local utility company can test the resistance of the existing ground rods with a clamp-on ground tester
that measures zero resistance. If that test determines that the grounding system is inadequate, the utility
company can suggest methods to improve the system. It’s crucial that the scale owner authorize and make
the recommended improvements to assure an adequate electrical ground.
An integral part of the load cell lightning protection system is a
grounding strap securely connected to the top plate and bottom plate
of each load cell mount. This strap is designed to channel power
surges on the deck around—rather than through—the load cell to
ground.
A separate grounding system conductor must extend uninterrupted from the main service panel to the
scale to protect load cells and scale wiring from lightning and other transient damage. This ground wire
conductor must be #10 bare copper wire or larger. Run the ground wire conductor unsheathed and intact
from the scale house power earth ground connection underground in a shallow trench to the transient
protection device and the grounding lug within the junction box.
All ground wire connections must be torqued tightly and retightened at regular service intervals.A thick
coating of anti-oxidant grease should be maintained on all ground wire conections for further insurance.
Even the most carefully designed lightning protection system is useless if connections become loose.
Corroded or loose ground wire connections could cause thousands of dollars of load cell damage from a
nearby lightning strike in a thunderstorm.

10
Lightning and Transient Protection Options
A lightning protection package is available as an option for all SR and EZ scales. The individual compo-
nents of this comprehensive package are designed to protect AC and DC portions of the system, as well as
any serial communication lines. The optional lightning protection package consists of the following:
• DC transient protection board(s) mounted within the junction box. This DC transient protector
handles up to eight load cells and also protects serial communication lines. Scales with more than
eight load cells will require a DC transient protection board in each junction box.
• Self-contained DC transient protection unit in homerun cable at indicator.
• Single-point #10 bare ground conductor cable buried in earth from scale frame to DC transient
board in junction box to DC transient board at indicator, then to AC power ground lug.
• 120 VAC uninterruptible power supply/surge protector in AC line before indicator.
All elements of the optional package must be installed in order to apply for the Lightning Protection
Extended Warranty Coverage detailed on the following page.
Grounding and Transient Protection on Typical SR Scale
21306 REV. B
-SI +SI +SE
JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12
TRIM 8TRIM 7TRIM 6TRIM 5TRIM 4TRIM 3TRIM 2
-SE SHD +EX -EX
CELL 2 CELL 8CELL 7CELL 6CELL 5CELL 4CELL 3CELL 1INDICATOR
TRIM 1
PT8PT7PT6PT5PT4PT3PT2PT1
RNET2RNET1 RNET3 RNET4
PT10
SECTION 3 TRIM
3 2 1
ON
SECTION 2 TRIM
3 2 1
ON
PT10
PT9
SECTION 1 TRIM
3 2 1
ON
SECTION 4 TRIM
3 2 1
ON
PT12
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
TO LOAD CELLS
TO INDICATOR
+EXC –EXC +SEN +SIG –SEN –SIG SHLD
+EXC –EXC +SEN +SIG –SEN –SIG
SHLD
EARTH GROUND
To Scale Frame
To DC Protection Ground
Connection before Indicator
10 ga. Bare Wire
DC protection board
10 ga. Bare Ground Wire
Junction Box with DC Transient
Protection Board Installed
NOTES:
The scale frame must be connected with 10
ga. wire to the ground lug of the transient
protection board inside the junction box.
Scales with more than one junction
box require a transient protection board in
each box. Ground lugs on each board must
be interconnected with 10 ga. wire.
Fiinal ground wire connection must be at AC
power supply ground terminal or ground rod.
a
a a
a a a a
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aa
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a a a
a a
a a
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a a a
a
a aa
aa
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a
a
a
Ground Lug

11
Lightning Protection Extended Warranty Coverage
Extended warranty for lightning protection covers materials only. Determine the amount of coverage and cost of lightning protection packages
(available only at time of vehicle scale order) by following the steps outlined below.
1. Select the order number of Lightning Protection Package (LPP1 or LPP2) you need with the vehicle scale you are purchasing (ex: an 8-load cell
unit is LPP1 for $1,465.00).
2. Determine the zone you are located in (see above map).
3. Find the number of years of extended coverage you desire. The first year of coverage is included in LPP1 or LPP2 Lightning Protection Package
and is the same price no matter what zone you are in.
4. Select the part number for the coverage time desired from your zone category.
5. To qualify for the extended warranty coverage you must purchase the Lightning Protection Package (LPP1 or LPP2).
6. In addition to the purchase of the Lightning Protection Package (LPP1 or LPP2) there also must be a biannual contract inspection of the site
and inspection of the transient protection electronics for acceptance of coverage by Rice Lake Weighing Systems. The inspection must be
completed by a qualified RLWS distributor.
PART # DESCRIPTION LIST PRICE
Lightning Protection Packages (LPP1 and LPP2)
45610 First year, 4 to 8 load cell system (LPP1) ..........................................................$1,465.00
45609 First year, 10 to 12 load cell system (LPP2) ......................................................$2,035.00
Storm Area 1 Lightning Zone
45628 Year 2 .......................................................................................................add $500.00
45629 Year 2 and 3 .............................................................................................add $1,000.00
45630 Year 2, 3 and 4 .........................................................................................add $1,500.00
45631 Year 2, 3, 4 and 5 .....................................................................................add $2,000.00
Storm Area 2 Lightning Zone
45632 Year 2 .......................................................................................................add $550.00
45633 Year 2 and 3 .............................................................................................add $1,100.00
45634 Year 2, 3 and 4 .........................................................................................add $1,650.00
45635 Year 2, 3, 4 and 5 .....................................................................................add $2,200.00
Storm Area 3 Lightning Zone
45636 Year 2 .......................................................................................................add $600.00
45637 Year 2 and 3 .............................................................................................add $1,200.00
45638 Year 2, 3 and 4 .........................................................................................add $1,800.00
45639 Year 2, 3, 4 and 5 .....................................................................................add $2,400.00
Storm Area 4 Lightning Zone
45640 Year 2 .......................................................................................................add $650.00
45641 Year 2 and 3 .............................................................................................add $1,300.00
45642 Year 2, 3 and 4 .........................................................................................add $1,950.00
45643 Year 2, 3, 4 and 5 .....................................................................................add $2,600.00
Storm Area 5 Lightning Zone
45644 Year 2 .......................................................................................................add $750.00
45645 Year 2 and 3 .............................................................................................add $1,500.00
45646 Year 2, 3 and 4 .........................................................................................add $2,250.00
45647 Year 2, 3, 4 and 5 ............................................................................................+3,000.00
Storm Area 2
Storm Area 1
Storm Area 4
Storm Area 3
Storm Area 5
WI
MN
ND
SD
NE IA
CA
KS
OK
TX
MO
AR
LA
IL IN OH
MI
KY
TN
MS AL GA
FL
SC
VA
PA
ME
VT
NH
MA
RI
CT
NJ
DE
MD
AK
HI
WV
NC
NV
OR
WA
ID WY
UT
NM
CO
AZ
MT
NY

12
Lightning Protection Extended Warranty Inspection Document
DEALER INSPECTION DOCUMENT
Effective Date: 5-1-98
The following documentation should be filled out and kept on file for warranty claim purposes on the EXTENDED
LIGHTNING PROTECTION WARRANTY CLAIM. Please have two signatures: the site end-user supervisor or
acceptable end-user alternate employee, and the service technician that performed the inspection.
KEEPTHIS DOCUMENT ON FILE IN CUSTOMER FILE FOR FUTURE FACTORY
REFERENCE.
————————————————————————————————————————————————
RICE LAKE VEHICLE SCALE MODELNUMBER: ____________________
Serial number of scale: ____________________
Serial number of PCB inspected: ____________________
Indicator serial number: ____________________
Printer Serial number: ____________________
DATE OF INSPECTION: ____________________
REVIEW THE FOLLOWING ITEMS in your INSPECTION
Are J-box transient protection board components discolored, deformed, or burned out? YES / NO
Is the grounding cable connected to the ground rod? YES / NO
Is the grounding cable connection corroded? YES / NO
Is the A/C protection connected? YES / NO
Is the A/C protection grounded? YES / NO
Signature of Distributor Technician: ______________________________ Date: ________
Signature of End-User Site Supervisor: ______________________________ Date: ________

13
Electrical Conduit Requirements for Scale Wiring
Trench Conduit to Indicator and AC Power Supply
Trench #10 Conductor to AC Power Supply Ground Rod
Typical Example of Conduit Runs on 70' x 14' Scale
Galvanized Metal Conduit
Flexible Rubberized Conduit
Junction Box Location Determined by LC Cable Lengths
Load Cells to Junction Box
Each load cell is equipped with 60' of load cell cable. This length is sufficient to reach a centrally-located
junction box on all standard scales. A watertight LB right-angle connector and 30" of 3/4" flexible conduit
is supplied for each load cell. At the junction box, watertight conduit connectors and 30" flexible conduit
sections are provided for each of the conduits runs. Main conduit runs between these 30" flexible sections
are to be 3/4" galvanized metal conduit obtained locally.
Junction Box to Indicator
6-wire homerun cable is run in 3/4" galvanized metal conduit from the junction box to the indicator. 60' of
homerun cable is supplied. A 30" flexible conduit section and watertight conduit connector is provided
where this cable exits the junction box. Galvanized metal conduit is to be obtained locally.
Indicator to Peripherals
All conduit for cabling to peripheral devices is the responsibility of the installer to obtain locally.
Single-Point Ground Conductor
As noted in the previous section, a bare 10 gauge solid
wire is to be run underground from the grounding lug
on the junction box to the main AC power earth
ground. If the optional DC transient protection board is
installed as shown at right, the ground conductor
should also be attached to the transient protection
board’s ground lug.
This bare ground cable is not to be run in conduit, but
should be buried to provide direct earth contact.
Cable Placement in Trenches
As a general guideline, run AC and DC cables in
separate trenches if possible. When DC load cell cables
must run in the same trench as AC power lines, sepa-
rate cables as much as possible to avoid interference.
See the scale installation manual for additional details.
21306 REV. B
-SI +SI +SE
JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12
TRIM 8TRIM 7TRIM 6TRIM 5TRIM 4TRIM 3TRIM 2
-SE SHD +EX -EX
CELL 2 CELL 8CELL 7CELL 6CELL 5CELL 4CELL 3CELL 1INDICATOR
TRIM 1
PT8PT7PT6PT5PT4PT3PT2PT1
RNET2RNET1 RNET3 RNET4
PT10
SECTION 3 TRIM
3 2 1
ON
SECTION 2 TRIM
3 2 1
ON
PT10
PT9
SECTION 1 TRIM
3 2 1
ON
SECTION 4 TRIM
3 2 1
ON
PT12
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
+EXC -EXC +SIG -SIG SHD
TO LOAD CELLS
TO INDICATOR
+EXC –EXC +SEN +SIG –SEN –SIG SHLD
+EXC –EXC +SEN +SIG –SEN –SIG SHLD
EARTH GROUND
To DC Protection Ground
Connection before Indicator
DC protection board
10 ga. Bare Ground Wire
Ground Lug

14
Site Information and Foundation Specifications
Overview
The reinforced concrete slab foundation or reinforced concrete pier foundation must be constructed in
accordance with supplied drawings and specifications. Both foundation systems are dimensionally
identical at contact points with the scale. Either the slab or pier foundation may be used with the SR or EZ
series scales, depending on local climate and soil conditions.
Per NTEP specifications, level concrete approaches at least 10' in length are required at entrance and exit
to the scale. Necessary ramps from approaches to existing grade may be concrete, asphalt, gravel or other
suitable surface. Contact your State Weights and Measures Department for site-specific requirements.
Soil Bearing Capacity
Footings must bear on undisturbed soil or compacted granular fill per specifications with a minimum
bearing capacity of 3000 psf. It is the responsibility of the concrete contractor to verify this value. If soil
at the bottom of a footing is of questionable value, notify the local project engineer.
Deviation from Published Specifications
Foundation drawings from Rice Lake Weighing Systems include all dimensions, steel reinforcement
details, and concrete mix specifications to complete the foundation construction. Estimated material
quantities are also included on the drawings. Any deviations from the published drawings must be ap-
proved in writing from Rice Lake Weighing Systems.
Concrete Sampling
A schedule of concrete sampling sets taken in approved cylinders per ASTM C31, C39, and C172 is
detailed on the drawings. Aset of cylinders is to be broken at 7 days and 28 days by an approved soil
testing facility, and a third set is to be stored by the concrete contractor and maintained in good condition.
Pier Foundation
Reinforced Slab Foundation
10' Approach Ramp (34' typ.)10' Approach
Ramp (34' typ.)
10' Approach Ramp (34' typ.)

15
Concrete, Rebar, and Mesh Requirements
Materials estimates for concrete foundations (slab or pier), approaches, standard 34' long ramps, and
decks can be drawn from the following charts. The charts include the most popular truck scale models
from 11' x 60' up to 14' x 93'. Note that either a reinforced slab foundation, or a pier foundation may be
used with any of the scale models.
The following charts assume that the pier foundations do not include a concrete cleanout pad around the
piers beneath the weighbridge. If adding a concrete cleanout pad, increase concrete quantity accordingly.
The charts assume standard 10' approaches and 34' long concrete ramps to final grade.
EZ scale decks are poured using either Polyfill fibermesh concrete or standard 4,000 psi concrete and
6" x 6" x 10 gauge steel reinforcing mesh.
SR scale decks require corrugated sheeting (to support concrete) and rebar to be obtained locally and
added on site. Rebar sizes and exact quantities are listed on the assembly drawings for each scale. Corru-
gated sheeting quantities can be estimated by adding 20% to the square footage of the scale deck area.
These charts are for preliminary estimating purposes only. For exact material quantities and sizes, refer to
the drawing # referenced with each scale model in the charts.
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