NTS System 80 User manual
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 1 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
NTS System 80
INSTALLATION GUIDE
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 2 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
Introduction
A functional and cost effective hydraulic bracing system:
System 80, heavy duty hydraulic bracing system – suiting larger sized cofferdams
Double acting hydraulic jacks, combine with a range of fixed length extensions & struts, to enable a quick installation
and final removal. Unique, pre-cambered beams, enhancing clear span openings and minimising beam deflection
when loaded.
Assembly
All components should be laid on timber skids, outside of the excavation.
All lifting must be carried out by operatives trained as slinger/ banksman. Familiarisation of the loads is essential be-
fore lifting - ensure that suitable 2 leg or 4 leg chains are selected (recommend 13mm chains).
Due to the weight of the components, it is recommended that the minimum sheet thickness is 8mm and the sheet
piles/ trench sheets are fully toed in.
Excavate to the required depth, as stated on the design, in order to install the first frame (usually a max of 1000mm).
The components can be lowered into the excavation, onto suitable timber skids or pre-installed gallows brackets.
Line up the connecting lugs and insert the pins, to form the continuous legs (ensure that back plates are also fully
bolted at each connection. (Note if the crane/ excavator is capable, fully connected components can be lowered to-
gether).
The hydraulic ram is extended and retracted, using the NTS motorised pump. Connect the hoses, as described in the
NTS Motorised Shoring Pump Guide.
Extend the rams to make connection across the four sides of the excavation. It is recommended that a pre-load of
100 Bar / 1500 psi is not exceeded. Check the frame for alignment and level - note the precam-ber in the waling
beam will straighten when loaded.
Ensure that the design installation sequence is followed.
The system is compatible with knee bracing (using swivel units) and hydraulic struts, which are installed, once the
four sided bracing system in installed and pumped out. Note: Struts have a maximum range of 200t up to 16m.
Removal
Removal is a reverse of the installation, ensuring material is backfilled and compacted as the extraction proceeds.
Maintenance
Prior to making entry to the supported excavation, ensure all components are fitted and show no signs of damage or
fatigue or fluid/ pressure loss. Safe means of access/ egress should be provided, using NTS ladder access / ladders
and Davit Systems.
Issue No: 03
Issue date: April 2020Sheet 3 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
Hydraulic Ram Unit
MaterialDomex Fy= 690N/mm2
Length (Pin to Pin)3,000mm – 4,000mm
Weight2,240kg
Axial Hydraulic Capacity150t
Maximum Moment1,150kNm
Maximum Shear2,000kN
Maximum Axial Load1,375kN
Mechanical Unit
MaterialDomex Fy= 690N/mm2
Length (Pin to Pin)4,600mm – 6,000mm
Weight2000kg
Maximum Moment1,150kNm
Maximum Shear2,000kN
Maximum Axial Load3,330kN
1,250mm Waler
Length1,250mm
Weight1,120Kg
3,000mm Waler
Length3,000mm
Weight1,360Kg
7,000mm Waler
Length7,000mm
Weight2,225Kg
10,000mm Waler
Length10,000mm
Weight2,925Kg
MaterialDomex Fy= 690N/mm2
Maximum Moment1,280kNm
Maximum Shear2,310kN
Maximum Axial Load8,450kN
System 80 Technical Data
INSTALLATION GUIDE
NTS System 80
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 4 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
1,000mm Strut
Length1,000mm
Weight300Kg
2,000mm Strut
Length2,000mm
Weight430Kg
3,000mm Strut
Length3,000mm
Weight550Kg
5,000mm Waler
Length5,000mm
Weight810Kg
MaterialFy= 345N/mm2
Maximum Axial Load2,891kN
System 80 Technical Data
Hydraulic Strut Ram Unit
MaterialDomex Fy= 690N/mm2
Length (Pin to Pin)2,400mm – 4,000mm
Weight1,580kg
Axial Hydraulic Capacity150t
Maximum Axial Load1,375kN
Waler to Strut Hanging Bracket
MaterialFy= 345N/mm2
Weight125kg
Maximum Axial Load4,180kN
Waler to Strut Swivel Unit
MaterialFy= 345N/mm2
Weight400kg
Maximum Shear370kN
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 5 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
System 80 Technical Data
Hanging Bracket
Hydraulic Strut Ram Unit
30mm Bolt
M30 Bolt Grade 8.8
Strut Connection
Sits Upon Waler
Hanging Bracket Connection
Strut Connection
M30 Bolt Grade 8.8
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 6 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
Hydraulic Strut Ram - Hanging Bracket
System 80 Technical Data - Connections
4 No M30 Bolts Grade 8.8
Strut Ram
Hanging Bracket
Waler
6 No M30 Bolts Grade 8.8
Strut
Strut / Strut Hydraulic Ram
Strut - Strut or Hydraulic Ram
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 7 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
Waler - Waler - 1128kN SWL
System 80 Technical Data - Connections
63mm Pin2 No M30 Bolts Grade 8.8
2 No M30 Bolts Grade 8.8
Strut Ram - Swivel Unit - Waler - 1620kN SWL
StrutRam
76mm Pin2 No M30 Bolts Grade 8.8
Swivel Unit
2 No M30 Bolts Grade 8.8
5 No M30 Bolts Grade 8.8
5 No M30 Bolts Grade 8.8
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 8 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
System 80 Technical Data
Corner Connection End
76mm Pin
Waler Extension End
60mm Pin
Swivel Unit Connection
Hydraulic Ram Unit
Mechanical Unit
Waler Extension End
60mm Pin
Corner Connection End
76mm Pin
305mm Increments
2 No Pins Required
Swivel Unit Connection
Swivel Unit
30mm Bolt
76mm PinWaler Connection
Strut Connection
30mm Bolt
INSTALLATION GUIDE
NTS System 80
Issue No: 03
Issue date: April 2020Sheet 9 of 9National Trench Safety can support your project.
Call our National Team - 03332 076 007
NTS (UK), Unit 28 Moor Lane Trading Estate, Moxon Way,
Sherburn in Elmet, Leeds, LS25 6ES.
The information contained within these data sheets remains the property
of NTS (UK) and is not to be altered or reproduced without written
permission. NTS (UK) reserves the right to change any data without
giving prior notice. ONCE PRINTED - UNCONTROLLED
Mechanical Unit - Hydraulic Ram Unit - 540kN SWL
System 80 Technical Data - Connections
76mm Pin
Mechanical Unit
Hydraulic Ram Cylinder Access
Waler - Hydraulic Ram Unit - 376kN SWL
63mm Pin
WalerHydraulic Ram Unit
Hydraulic Ram Unit
Waler - Hydraulic Ram Unit - 1128 kN SWL
Waler63mm PinWaler
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