FireRock FIREROCK LINEAR User manual

IMPORTANT: This manual contains product usage guidelines infield application rules installation steps and operating and
maintenance instructions for the FireRock Linear preengineered masonry fireplace kit This manual should become the property
of and be reviewed by all current and future users of this product It is the responsibility of the general contractor and the installer
to ensure that the instructions set forth in this manual are followed exactly It is also the responsibility of the general contractor to
provide adequate clearance to combustibles see page  from all fireplace surfaces as specified herein
Before installing this product please consult with local building and zoning authorities regarding the need for proper permitting
If the information in this manual including installation instructions is not followed exactly a fire or explosion may result causing
property damage personal injury or loss of life
IMPORTANT: Read the entire manual before beginning construction.
Contents of this manual may change without prior notification
Installer: Leave this manual with the appliance.
Consumer: Keep these instructions for future use.
MANUFACTURING:
 Avenue C
Birmingham AL 
ADMINISTRATIVE:
 st Ave N #
Birmingham AL 
PHONE   FAX  TOLLFREE  
LISTED MASONRY FIREPLACE SYSTEM
MODEL FIREROCK LINEAR
” AND ” MODULAR FIREPLACE
UL 127 COMPLIANT
LINEAR FIREPLACE
INSTALLATION, SPECIFICATION AND OPERATION MANUAL

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TABLE OF CONTENTS
Important Safety Information 
Intended Use Statement 
Materials and Equipment List 
Parts Dimensions 
Installation Considerations 
Warnock Hersey Listing Label 
Fireplace Dimensions 
Clearance to Combustibles 
Rough Framing Dimensions 
Fireplace Installation 
Foundation 
Mixing and Applying Mortar 
Firebox Assembly 
Throat and Damper Assembly 
Smoke Chamber Assembly 
Insulstick Application 
Chimney Assembly 
Firebrick Installation 
Brick Flange 
Outside Air Kit 
Typical Gypsum Board Application 
MultiFloor Stacking Diagram 
Metal Chimney Installation 
Operating Instructions 
Terms and Conditions 


























4
IMPORTANT SAFETY INFORMATION
The FireRock Linear fireplace is a modular system designed to be assembled in field using FireRock Adhesive Mortar Each
component is designed for a specific part of the firebox smoke chamber and flue design and therefore only one means of
assembly is possible A minimum  ¹₂” thick firebrick lining is required for the floor and back wall with  ¹₄” thick firebrick lining
on the side walls All firebrick used must comply with ASTM 
Any application other than the “intended use” stated herein is in violation of the manufacturer’s instructions and is hereby
prohibited Such violations may cause immediate hazard property damage or loss of life and will void all liabilities to the
manufacturer and will void all warranties explicit or implied
Read the installation and operating instructions carefully and in full to be sure you understand them prior to installation If the
information in this manual including installation instructions is not followed exactly a fire or explosion may result causing
property damage personal injury or loss of life
 Check local building codes pertaining to fireplaces and fireplace installation All installations must comply with local
regional state and national building codes and regulations
 Maintain the stated minimum clearance to combustibles see page  and do not violate any specific installation
requirement
 Do not pack required air spaces with insulation or other materials
 Foundations and footings must meet local building code and be approved by the local building authority For any
foundation design and load requirements check with a structural engineer
 This fireplace is not designed to sit directly on or abut a combustible surface or floor system
 Ensure that an adequate supply of replacement air from outside of the house is accessible to the fire to support normal
combustion It is the responsibility of the builder or contractor to supply adequate combustion air
 Do not use a fireplace insert or other product not specified for use with a fireplace with the reflective properties of this
product
 This fireplace has not been tested for use with doors To reduce the risk of fire or injury do not install doors
 Do not burn construction debris of any kind in this fireplace
 Do not burn small branches or twigs that exceed the volume of a normal fire see page  Overfiring can permanently
damage the system
 Only vented gas logs that are listed by ANSI Z can be used in this fireplace
 This fireplace has not been tested with an unvented gas log set Do not install an unvented gas log set in this fireplace
NOTE: This is important safety information for the installation of this fireplace
For safety information regarding the operation of this fireplace see pages 

5
INTENDED USE STATEMENT
NOTE: Illustrations in this manual are not to scale and are intended to show “typical” installations The FireRock ” Linear
model is shown throughout this manual Nominal dimensions are given for design and framing reference only since actual
installations may vary due to job specific designs and preferences Always maintain the stated minimum clearance to combustibles
and do not violate any specific installation requirement
The fireplaces and chimney system are tested and listed by Intertek Testing Service to UL  and UL 
The FireRock fireplace is designed to burn wood gas or coal Use solid wood processed solid fuel fire logs natural gas propane or
coal fuel only Only vented gas logs that are listed by ANSI Z can be used in this fireplace
Burning some fuels such as charcoal can be hazardous due to the possibility of producing carbon monoxide which is both
invisible and odorless Overexposure to carbon monoxide can lead to illness and death It is strongly recommended to install
smoke and carbon monoxide detectors wherever fireplaces are in use
This fireplace is intended for use as a supplemental heat source only and is not intended for heavy use as a primary heating system
Overfiring abusive burning or mistreatment will void any warranty claims
Do not use a fireplace insert or other product not specified for use with a fireplace with the reflective properties of this product
The fireplace must sit on a concrete pad or slab that is designed to bear the total weight of the fireplace and chimney This pad
or slab should provide for the noncombustible hearth extension substrate needed to support the code required noncombustible
hearth extension finish materials This fireplace is not designed to sit directly on or abut a combustible surface Installing this
fireplace directly on a combustible surface may result in a fire or explosion causing property damage personal injury or loss of life
This product is designed to work with the FireRock Solid Block masonry flue system or any appropriately sized UL  compliant
metal prefabricated flue system The metal flue system manufacturer must offer an anchor plate specifically designed for the
purposes of attaching the metal flue to the masonry fireplace Installation of the chimney must conform to the manufacturer’s
installation instructions
The Linear fireplace is designed and listed to be  courses tall with an overall opening height of ” Modifications cannot be
made to reduce the opening height below published dimensions
Recommended minimum overall height for the Linear fireplace and FireRock masonry chimney system for an indoor application
is ’ for a straight vertical chimney Maximum overall height is ’
For heights above ’ consult a structural engineer for additional structural support These heights do not reflect information
regarding metal flue Any UL  metal flue can be used on FireRock fireplaces See metal flue manufacturer’s installation
instructions for information relating to height requirements/restrictions For outdoor applications there is no minimum height
requirement
Any fireplace insert must be approved in writing by FireRock Products LLC Failure to heed this warning could result in failure of
this product and/or the insert product
Always obtain necessary permits from proper authorities in local jurisdictions and comply with all local building codes
All work performed on near and adjoining the fireplace and chimney installation must meet or exceed the specifications and

6
requirements in this manual and the prevailing local building code Subsequent renovations and/or additions of cabinets and
storage spaces in the enclosure surrounding the fireplace are also limited to the specifications in this manual and to the prevailing
local building code
Modifications to fireplace components not mentioned in this manual may void warranty claims listing and approvals and could
result in an unsafe and potentially dangerous installation Alterations to the firebox are allowed with prior written approval and
instruction from FireRock The installer indemnifies will defend and hold harmless the manufacturer from all claims and losses
and under no circumstances will manufacturer be liable for damages of any kind or nature whether foreseeable or not arising out
of or relating to any modifications of the fireplace by the installer
This fireplace has not been tested for use with doors To reduce the risk of fire or injury do not install doors Using this fireplace
with doors installed may result in a fire or explosion causing property damage personal injury or loss of life
The FireRock Linear fireplace is approved for Indoor and Outdoor use Maintain stated clearance to combustibles for indoor and
outdoor use
INTENDED USE STATEMENT
(CONTINUED)

7
See page 8-13 for component specifications
MATERIALS AND EQUIPMENT LIST
NOTE: Some of the components of this fireplace are extremely heavy and should not be lifted by one person Because of this
realize that building this fireplace is at minimum a twoman job
60” 72”
” Base Plate 
” Base Plate 
Firebox Side  
 ³₄” Back Wall Courses  &   
 ¹₄” Back Wall Courses   
 ³₄” Back Wall Courses  
 ¹₄” Back Wall Courses  &  
 ³₄” Back Wall Courses  
 ¹₄” Back Wall Courses  &  
” Radius Throat Front 
” Radius Throat Front 
” Radius Throat Front 
” Square Throat Back 
” Square Throat Back 
” Square Throat Back 
Throat Side  
 ⁵₁₆” Smoke Chamber Front/Back 
 ⁵₁₆” Smoke Chamber Front/Back 
 ¹¹₁₆” Smoke Chamber Front/Back 
 ⁵₁₆” Smoke Chamber Front/Back 
 ¹¹₁₆” Smoke Chamber Front/Back 
 ¹¹₁₆” Smoke Chamber Front/Back 
 ⁵₁₆” Smoke Chamber Front/Back 
 ¹¹₁₆” Smoke Chamber Front/Back 
Smoke Chamber Side  
” Chimney Base 
” Chimney Base 
TOTAL 32 34
REQUIRED MATERIALS & EQUIPMENT
 Concrete for pad/foundation
 Clean water
 Trowel
  gallon bucket
 Level
 Plastic shims
 FireRock Adhesive Mortar
 Insulstick
 Damper for interior applications
 Firebrick
 Masonry chimney block or UL  metal
pipe with required accessories
OPTIONAL MATERIALS & EQUIPMENT
 Rebar to fill hurricane holes in masonry
chimney blocks
 CMU block
 Outside air kit
 Log lighter
 Noncombustible stone or veneer for
outdoor applications
LINEAR
MASONRY FIREPLACE SYSTEM COMPONENTS

8
FIREPLACE PARTS
SIDE ELEVATION PLAN ISOMETRIC
FRONT ELEVATION
BASE PLATE
ISOMETRIC
PLAN
SIDE ELEVATION
FRONT ELEVATION
FIREBOX SIDE
FIREPLACE SIZE DIM A DIM B DIM C DIM D
60” ” ”  ¹₂” ”
72” ” ”  ¹₂” 
*THIS PART IS SPLIT INTO TWO PIECES

9
FIREPLACE PARTS
(CONTINUED)
ISOMETRIC
PLAN
SIDE ELEVATION FRONT ELEVATION
FIREBOX BACK WALL
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
RADIUS THROAT FRONT
60” FIREPLACE DIM A DIM B
ROW 1  ³₄”  ¹₄”
ROW 2  ¹₄”  ³₄”
72” FIREPLACE DIM A DIM B
ROW 1  ³₄”  ¹₄”
ROW 2  ¹₄”  ³₄”
*THIS PART IS SPLIT INTO TWO PIECES
FIREPLACE SIZE DIM A DIM B DIM C DIM D DIM E DIM F
60” ”  ³₄” N/A N/A N/A N/A
72” ”  ³₄”  ⁷₈”  ⁷₈” ” ”
*THIS PART IS SPLIT INTO TWO PIECES FOR THE 70” MODEL

10
FIREPLACE PARTS
(CONTINUED)
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
SQUARE THROAT BACK
ISOMETRIC
BACK ELEVATION
SIDE ELEVATION PLAN
THROAT SIDE LEFT
FIREPLACE SIZE DIM A DIM B DIM C
60” ” N/A N/A
72” ” ” ”
*THIS PART IS SPLIT INTO TWO PIECES FOR THE 70” MODEL

11
PLAN
SIDE ELEVATION ISOMETRIC
BACK ELEVATION
THROAT SIDE RIGHT
PLAN
FRONT ELEVATION
SIDE ELEVATION ISOMETRIC
SMOKE CHAMBER FRONT/BACK
FIREPLACE PARTS
(CONTINUED)
60” FIREPLACE DIM A DIM B DIM C
ROW 1 ”  ¹¹₁₆”  ⁵₁₆”
ROW 2 ”  ⁵₁₆”  ¹¹₁₆”
72” FIREPLACE DIM A DIM B DIM C
ROW 1 ”  ¹¹₁₆”  ⁵₁₆”
ROW 2 ”  ⁵₁₆”  ¹¹₁₆”
*THIS PART IS SPLIT INTO TWO PIECES

12
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
UNIVERSAL SMOKE CHAMBER SIDE
PLAN
SIDE ELEVATION
CHIMNEY BASE
FIREPLACE PARTS
(CONTINUED)
FIREPLACE SIZE DIM A
60” ”
72” ”
*PART SHOWN IS LEFT SIDE. RIGHT SIDE IS MIRRORED TO FIT.

13
FIREPLACE PARTS
(CONTINUED)
CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC

14
INSTALLATION CONSIDERATIONS
A. COMBUSTION AIR + SMOKE DRAW
Always ensure that an adequate supply of replacement air from outside of the house is accessible to the fire to support normal
combustion Fireplaces consume large volumes of air during the normal firing process and will only draft properly when they are
installed according to the instructions in an appropriate location and with the proper chimney height Installing the fireplace
according to the installation instructions choosing a proper location and determining an appropriate chimney height is the
responsibility of the designer and the general contractor
Outside air kits can be installed in all FireRock fireplaces to supplement combustion air Determining that the building’s internal
air pressures are conducive to positive fireplace drafting and whether an outside air kit should be included in the installation is the
responsibility of the designer and the general contractor
In the event the home is tightly sealed ie spray foam insulation or house wrap an outside air kit may not provide all the air
required to support combustion and the proper flow of combustion gases up the chimney The manufacturer is not responsible for
any smoking or related problems that may result from the lack of adequate combustion air supply flowing into the house It is the
responsibility of a builder/contractor to ensure that adequate air supply has been provided for the fireplace
Avoid placing a fireplace in an area near tall trees or buildings that can reduce air flow pressure and/or produce down drafts
FireRock Products LLC does not warrant drafting and is not responsible for it
Refer to page  for more information on using an outside air kit with a FireRock preengineered masonry fireplace kit
B. TERMINATIONS
The termination of the chimney above the roof must extend at least ’ above the highest point where it passes through the roof
and at least ’ higher than any portion of a building within ’
The FireRock Solid Chimney Block system is approved for use with properly sized rain caps chimney pots and other decorative
features
If using a UL  listed metal chimney refer to the metal flue manufacturer for approved chimney caps shrouds and covers and
rain caps FireRock does not manufacture these components and therefore defers to the manufacturer’s instructions
C. BROKEN COMPONENTS
Components that become broken due to poor handling or shipping should be mortared back together providing the breaks or
cracks are clean and original alignment and dimension can be maintained Components broken into multiple pieces or fragments
must be discarded and replaced When in doubt about a component’s usability consult your FireRock distributor or authorized
FireRock representative for advice You may also call the FireRock Technical Support Desk tollfree at 
Failure to provide an adequate air supply for the unit can result in the emission of smoke sparks or hazardous gases into the
house and in some cases may result in a fire or explosion causing property damage personal injury or loss of life

15
D. GAS LINE APPLICATIONS
The FireRock fireplace may be drilled through with an ordinary masonry drill bit to accommodate a natural gas connection
This natural gas connection may be used to  incorporate an automatic shutoff device and/or  comply with the Standard for
Decorative gas appliances for installation in Vented Fireplaces ANSI Z The decorative gas appliance should be installed in
accordance with the National Fuel Gas Code ANSI Z
E. LOG LIGHTER
A log lighter can be used with your FireRock fireplace as either a flush mount installed before the firebrick or top mount
FireRock recommends the log lighter be installed by a professional plumber See manufacturer’s instructions for directions on how
to install
HINTS
 If this is your first FireRock installation it would only take a few extra minutes to “dry stack” erect without mortar your
firebox to gain a better understanding of how the components go together Then disassemble and erect using FireRock
Adhesive Mortar
 Use a level to ensure all components are level by course and plumb as you erect your fireplace and chimney
 Ensure your base plate is level and at a proper elevation so the finished hearth height including firebrick lining is correct
in relationship to your finished floor height
 Realize that this is at minimum a twoman job Some of these components are too heavy for one person to lift
5. Always install in accordance with local codes.
INSTALLATION CONSIDERATIONS
(CONTINUED)
Only vented gas logs that are listed by ANSI Z can be used in this fireplace This fireplace has not been tested with an
unvented gas log set To reduce the risk of fire or injury do not install an unvented gas log set into this fireplace

16
LISTED MASONRY FIREPLACE SYSTEM
MODEL FireRock SERIES FIREPLACE
60” 72” LINEAR FIREBOX
CERTIFIED TO UL-127
WHI-
CLEARANCE TO COMBUSTIBLES
WITHIN ENCLOSURE AREA
UNIT TO NON-COMBUSTIBLE FLOOR 0” SMOKE CHAMBER TO TOP FRAMING 1”
FIREBOX & SMOKE CHAMBER TO BACKWALL 1” SMOKE CHAMBER TO FRONT WALL 1”
FIREBOX AND SMOKE CHAMBER TO SIDEWALL 1” MASONRY CHIMNEY TO JOISTS OR CHASSE 0”
EXPOSED SURFACES
OPENING TOP TO COMBUSTIBLE MANTLE (8”) 16” FIREPLACE OPENING TO SIDEWALL 32”
COMBUSTIBLE TRIM ABOVE/AROUND OPENING 12” SMOKE CHAMBER TO FRONT WALL 1”
SMOKE CHAMBER TOP TO FRAMING 1” MASONRY CHIMNEY TO JOISTS OR CHASSE 0”
HEARTH EXTENSION FRONT:* 32” HEARTH EXTENSION BEYOND SIDES: 8”
SEE FIRE ROCK’S INSTALLATION AND OPERATING INSTRUCTIONS FOR THIS MODEL
*ADDITIONAL FLOORING PROTECTION IS REQUIRED AS DETERMINED BY THE HEIGHT OF THE
UNIT. SEE FIREROCK INSTALLATION MANUAL FOR FLOORING PROTECTION SPECS.
REFER TO THE INTERTEK DIRECTORY OF BUILDING PRODUCTS
(HTTPS://BPDIRECTORY.INTERTEK.COM) FOR DETAILED INFORMATION.
***WARNINGS*** CCCCCCCCCC
MANUFACTURED BY: FIRE ROCK PRODUCTS, LLC; 3620 AVENUE C; BIRMINGHAM, AL 35064
USE SOLID WOOD, PROCESSED SOLID FUEL FIRE LOGS, NATURAL GAS, PROPANE, OR COAL FUEL
ONLY
DO NOT USE A FIREPLACE INSERT OR OTHER PRODUCTS NOT SPECIFIED FOR USE WITH THIS PRODUCT
THIS FIREPLACE HAS NOT BEEN TESTED WITH GLASS DOORS. TO REDUCE RISK OF FIRE OR INJURY
DO NOT INSTALL GLASS DOORS
WHEN BURNING GAS IN THE FIREPLACE, ADJUST DAMPER TO FULLY OPEN POSITION
ONLY VENTED GAS LOG SETS WHICH ARE LISTED ARE TO BE INSTALLED IN THIS FIREPLACE. DO
NOT OPERATE AN UNVENTED GAS LOG SET IN THIS FIREPLACE.
PLEASE PROOF COMPLETELY -
SIGN AND RETURN IF OKAY TO PRINT.
THE NAMEPLATE WILL PRINT
EXACTLY AS IT APPEARS HERE.
DO NOT SIGN IF CHANGES WERE MADE.
A NEW PROOF WILL NEED TO BE SENT.
THANK YOU
X
SIZE: 4-5/8” X 6-1/8”
NO HOLES OR ADHESIVE
W/N 21841
WARNOCK HERSEY LISTING LABEL

17
FIREPLACE DIMENSIONS
FIGURE 1.2
60” LINEAR FIREPLACE
5’-8”
5 -2 1/2”
4’-4”
2’-1 7/8”
2’-3 1/2”
0’-4”
0’-3”
0’-9”
0’-3” (TYP.)
1’-10”
4’-2”
1’-10” 1’-10”
0’-4”
6’-8”
6 -2 1/2”
5’-4”
2’-1 7/8”
2’-3 1/2”
0’-4”
0’-3”
0’-9”
0’-3” (TYP.)
1’-10”
5’-2”
1’-10” 1’-10”
0’-10”
FIGURE 1.3
72” LINEAR FIREPLACE
A
J
E
F
G
C
D
H
FIGURE 1.1
DIMENSION ” ”
AOVERALL WIDTH ” ”
OVERALL DEPTH ” ”
CFIREBOX HEIGHT ” ”
DSMOKE CHAMBER HEIGHT ” ”
EOPENING WIDTH ” ”
FOPENING HEIGHT 25.125” 25.125”
GWIDTH AT CHIMNEY BASE ” ”
H FIREBOX DEPTH ” ”
JWIDTH AT REAR ” ”
*before firebrick lining

18
CLEARANCE TO COMBUSTIBLES
Failure to maintain stated minimum clearances may result in a fire or explosion causing property damage personal injury or
loss of life
FIGURE 2.3
1”
Do not pack required air spaces with
insulation or other materials Using insulation
or other materials in required air spaces may
result in a fire or explosion causing property
damage personal injury or loss of life
NOTE “Combustibles” are defined as “normal construction materials” and are considered to be wood framing materials particle
board mill board plywood subflooring plywood paneling wood flooring and drywall
The fireplace must sit on a concrete pad or slab that is designed to bear the total weight of the fireplace and chimney This pad
or slab should provide for the noncombustible hearth extension substrate needed to support the code required noncombustible
hearth extension finish materials
A noncombustible hearth extension must extends ” beyond the front of the firebox and ” to either side when the hearth
extension is level with the floor of the fireplace Figure  The hearth extension can be reduced to ” only when the
hearth extension is raised ” or more above the combustible floor in front of the ” hearth extension Figure  Approved
noncombustible materials include brick tile or stone that is properly supported with no combustible material against the
underside
Opening to Side wall ”
Opening to Combustible Trim ’
Opening to Combustible Mantle with ”
Depth ”
Noncombustible Flush
Hearth Extension ” front ” each side
Noncombustible Raised ”
Hearth Extension ” front ” each side
Firebox and Smoke Chamber to
Combustibles or Framing ”
Smoke Chamber to Front Wall and
Smoke Chamber Top to Wood Framing ”
FIGURE 2.1
MANTLE
TRIM
FLUSH HEARTH EXTENSION
SIDEWALL
TILE/MARBLE 16”
32” 12”
32”
8”
MANTLE
TRIM
SIDEWALL
TILE/MARBLE 6”
” ”
20”
”
”
RAISED HEARTH EXTENSION
FIGURE 2.2

19
ROUGH FRAMING DIMENSIONS
The numbers listed are the framing dimensions recommended by FireRock which add ½” of air space to the required clearances
Always maintain the stated minimum clearance to combustibles for this unit
For ease of installation it is recommended to not install framing header until after firebox is installed
Rough framing dimension “A” includes the  ³₄” thick base plate Dimension “A” should be reduced by  ³₄” if the base plate is
eliminated to create a “flush hearth” A raised hearth requires additional rough opening height for dimension A equal to the height
of the raised hearth detail
A
B
C
FIGURE 3
Failure to maintain stated minimum clearance to combustibles on page  may result in a fire or explosion causing property
damage personal injury or loss of life
FIREBOX SIZE
” ”
A38.875” 38.875”
B30” 30”
C71” 83”

20
The FireRock fireplace must be erected on a
noncombustible base with a noncombustible ” hearth
extension in front of the firebox opening and at least ” on
either side of the firebox opening Figure  on page 
There are  types of foundations that can be used in this
type of installation
 Concrete Slab Figure 
 Concrete Pad Supported by Masonry CMU
Tower Figure  Typically used when the
fireplace is placed over a basement or crawl space
The noncombustible pad is best made from a ”
thick concrete slab with # rebar tied together at
maximum ” intervals center poured on top of
corrugated metal Concrete pad must be supported
by a full masonry tower with no combustible
underpinnings to withstand the weight of the
firebox and flue system
NOTE Use of the FireRock base plate is optional for either
of the above foundation types concrete slab or concrete
pad
FIREPLACE INSTALLATION
STEP 1: FOUNDATION
DEPTH WIDTH
” 50” 76”
” 50” 88”
CONCRETE PAD WITH HEARTH EXTENSION DIMENSIONS
FIGURE 4.1
CONCRETE SLAB
FIGURE 4.2
CONCRETE PAD SUPPORTED BY MASONRY (CMU) TOWER
This fireplace is not designed to sit directly on or abut a combustible surface Installing this fireplace directly on a
combustible surface may result in a fire or explosion causing property damage personal injury or loss of life
Foundations and footings must meet local code and
be approved by the local building authority For any
foundation design and load requirements check
with a structural engineer Failure to ensure adequate
foundations can cause significant property damage
It is the responsibility of the general contractor to
ensure adequate foundations