Since 1928
37–20 12th Street
Long Island City, NY 11101
 
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Cable Truss Systems (8', 12', 14')

3. Cable Truss System

Winsafe provides Cable Truss System configurations for 8 ft., 12 ft. and 14 ft. reach.

Figure 11. Cable Truss System - 8' Reach

3.1. Components

Cable Truss Assembly - 8 Ft. Reach: WS OR 88

 

3.2. Installation Procedure for - 8 ft. Cable Truss System

  1. Installation and use of the 8' reach Cable Truss System requires a clear space of at least 24 feet behind the parapet. The Cable Truss System is assembled in the sequence: Rear Beam, Beam Splice, Mid Beam, Beam Splice, second Mid Beam, Cable Truss Mast and Front Beam (see Figure 12).
  2. Assemble the Rear Beam (WS OR 39 or WS OR 44) -Beam Splice (WS OR 40) Mid Beam (WS OR 37) -Beam Splice (WS OR 40) - second Mid Beam (WS OR 37) by the assembly procedure in Section 2.3.1. Ensure that the retaining pins are inserted and the retaining clips are locked.

- Counterweight or clamp to structure to provide resistance to overturning with a safety factor of 4 to 1.
- Use counterweight saddles or long horn bar to secure additional weights as required (1400 LB weight required).

Tie back in accordance with applicable regulations and safe work practices

Item Part No. Description QTY
1 WS OR 37 Mid beam section - 8 ft. 2
2 WS OR 38 Front beam section for cable truss s stem - 8 ft. 1
3 WS OR 39
OR
WS OR 44
Rear beam section for saddle style weights - 8 ft.

Rear beam section for longhorn style weights - 8 ft.
1
4 WS OR 40 Beam splice - Standard 30 in. long 2
5 SP 165 Cable truss support 2
6 SP 167 Cable truss straps 16" with pins 1
7 SP 166 Cable truss straps 9" with pins 1
8 SP 168 Cable truss ropes (68 1/4 inch and 176 inch) 1
9   5/8 inch Snap lock pin 2

Figure 12.8 FT. Reach Cable Truss System

  1. Assemble the Front Beam with the second Mid Beam through the Cable Truss Support (SP 165). The Cable Truss Support pins to the second Mid Beam and Front Beam similar to a Beam Splice. Once again, ensure that the retaining pins are locked (see Figure 13).
  2. Ensure that the cable truss wire ropes are attached to their respective Cable Truss Straps. Pin the Cable Truss Strap (SP 166) to a hole provided in the Front Beam at approximately 3 feet (see Figure 14) from the front of the beam using a Retaining Pin (SP 169). Similarly, pin the Cable Truss Strap (SP 167) with the second Mid Beam using the Retaining Pin (SP 169) replacing the normal splice pin.

 

   
 

Figure 13. Assembly of Cable Truss Support with Beams

 

Figure 14. Assembly of Cable Truss Ropes with Cable Truss Strap

Figure 15. Reach with Sliding Collar

  1. Attach the suspension cable to the Front Beam pear link or to the optional sliding collar (see Figure 15). Only one suspension cable can be attached per beam.
  2. When moving the Cable Truss System into position ensure that the support for the front of the beam is located directly beneath the support feet of the cable truss support. Do not support the Cable Truss System on either side of the Cable Truss Support as this places the load on the aluminum beam and not on the Cable Truss Support and can cause damage to the aluminum beam.
  3. Install the counterweights in accordance with the chart below (see Table 2). If the sliding collar is used then the reach is determined by measuring the distance between the sliding collar and the Cable Truss Support vertical mast. The pear link is 96 inches from the Cable Truss Support.

Note:-

  1. Cable Truss Masts for Cable Truss Supports must be held on solid surfaces capable of carrying the applied load. Do not use insulating boards or other non-rigid materials under the Cable Truss Mast.
  2. You must use a Sliding Collar (WSH 5) in order to work at less than 96" reach. Install the Sliding Collar as shown in Figure 15. Reach is calculated from the base of the Cable Truss Support.

Table 2. Counterweight Chart for Cable Truss System - 8 ft.

Maximum 1000 Lb. Load -Beam Extends 24' Inboard of Truss Mast
Reach (inch)
(Sliding Collar Position from Base)
5'6"
60 inch
6'
72 inch
6'6"
78 inch
7'
84 inch
7'6"
90 inch
Maximum
93~95 inch
Counterweight (lbs) 870 1050 1130 1220 1320 1400


3.3. Installation Procedure for - 12 ft. Cable Truss System

  1. Installation of the 12' reach Cable Truss System requires a clear space of at least 28 feet behind the parapet. The Cable Truss System is assembled in the sequence: Rear Beam, Beam Splice, Mid Beam, Beam Splice, second Mid Beam, Inner Section, Cable Truss Support, Inner Section and Front Beam (see Figure 16).
  2. Assemble the Rear Beam (WS OR 39 or WS OR 44) -Beam Splice (WS OR 40)Mid Beam (WS OR 37) - Beam Splice (WS OR 40) - second Mid Beam (WS OR 37) -Inner Section (WS OR 113) by the assembly procedure presented in Section 2.3.1. Ensure that the retaining pins are correctly inserted and the retaining clips lock the snap lock pins (see Figure 7) during the assembly of the beams.

- Counterweight or clamp to structure to provide resistance to overturning with a safety factor of 4 to 1.
- Use counterweight saddles or long horn bar to secure additional weights as required.

Tie back in accordance with applicable regulations and safe work practices

Item Part No. Description QTY
1 WS OR 37 Mid beam section - 8 ft. 2
2 WS OR 38 Front beam section for cable truss s stem - 8 ft. 1
3 WS OR 39
OR
WS OR 44
Rear beam section for saddle style weights - 8 ft.

Rear beam section for longhorn style weights - 8 ft.
1
4 WS OR 40 Beam splice - Standard 30 in. long 2
5 WSOR 113 Inner Section 2
6 WSOR 114 Cable truss support 1
7 WSOR 116 Cable truss wire rope front 2
8 WSOR 117 Cable truss wire rope rear 2
9   5/8 inch Snap lock pin 4
10 SP 166 Cable truss straps 9" with pins 1
11 SP 167 Cable truss straps 16" with pins 1

 

Figure 16. 12 FT. Reach Cable Truss System

  1. Assemble the Front Beam (WS OR 38) with the Cable Truss Support (WS OR 114) through the second Inner Section. The second Inner Section pins to the Front Beam and Cable Truss Support similar to a Beam Splice. Ensure that the retaining pins are inserted and retaining clips are locked (see Figure 17).

Figure 17. Front Beam - Inner Section - Cable Truss

Figure 18. Reach with Sliding Collar Support Assembly

  1. Pin the Cable Truss Strap (SP 166) to the hole provided in the Front Beam at approximately 3 feet (see Figure 17) from the front of the beam using a retainer pin (SP 169). When pinning the straps to the beams ensure that the retaining pins are fully inserted and retaining clips are locked.
  2. Pin the Cable Truss Strap (SP 167) to the Mid Beam using the Retaining Pin(SP 169) replacing the normal splice pin (see Figure 16).
  3. Attach the suspension cable to the Front Beam Pear Link or through the optional Sliding Collar. Only one suspension cable can be attached per beam.
  4. When moving the Cable Truss System into position ensure that the support for the front of the beam is located directly beneath the support feet of the cable truss support. Do not support the Cable Truss System on either side of the Cable Truss Support as this places the load on the aluminum beam and not on the Cable Truss Support and can cause damage to the aluminum beam.
  5. Install the counterweights in accordance with the chart below (see Table 3). If the Sliding Collar is used then the reach is determined by measuring the distance between the Sliding Collar and the Cable Truss Support vertical mast. The pear link is 144 inches from the cable truss support.

Note:-

  1. Cable Truss Masts for Cable Truss Supports must be supported on solid surfaces capable of carrying the applied load. Do not use insulating boards or other non-rigid materials under the cable truss mast.
  2. You must use a Sliding Collar (WSH 5) in order to work at less than 144" reach. Install the optional Sliding Collar as shown in Figure 18. Reach is calculated from the base of the Cable Truss Support.

Table 3. Counterweight Chart for Cable Truss System - 12 ft.

Maximum 1000 Lb. Load - Beam Extends 28' Inboard of Truss Mast
Reach (inch) 9'6" 10' 10'6" 11' 11'6" Maximum
(Sliding Collar Position from Base) 114 inch 120 inch 126 inch 132 inch 138 inch 141~143 inch
Counterweight (lbs) 1360 1430 1500 1580 1650 1710


3.4. Tie-Back Instructions

Always use wire rope and cable clamps to securely connect the beam system to a suitable anchorage. The tie back rope and cable clamps must be equal in strength to the suspension rope. The anchorage must be capable of resisting 5000 lbs.

3.5. Cable Truss Stand - For 8' Reach Cable Truss

Figure 19. Cable Truss Stand Installation

Figure 20. Cable Truss Stand

The Cable Truss Stand (see Figure 19) is designed to support the base of the 8 ft. Reach Cable Truss. Note that the standard Beam Stand (WS BS 001) must not be used to support the Cable Truss System. The Beam Stand is used to support the rear of the Cable Truss System. The Cable Truss Stand must be installed prior to the installation of the Cable Truss System. The installation procedure for the Cable Truss System with the Cable Truss Stand is as follows:

  1. Place the base of the Cable Truss Support onto the shelf in the Cable Truss Stand and rotate the upper brace into position and pin it closed (see Figure 19, Figure 20).
  2. Assemble the remainder of the Cable Truss System. If you want the Cable Truss to be level, you can use a standard Beam Stand to support the rear of the Cable Truss. A Rear Beam Stand is not required if the angle of the Cable Truss System remains less than 15 degrees.

3.6. 14 ft. Reach Cable Truss System

3.6.1. Components

WS OR 147: Front Beam for 14' Reach Cable Truss WS OR 146: Cable Truss Support for 14' Reach Cable Truss


- Counterweight or clamp to structure to provide resistance to overturning with a safety factor of 4 to 1.
- Use counterweight saddles or long horn bar to secure additional weights as required (2400 LB weight required).

Tie back in accordance with applicable regulations and safe work practices

Item Part No. Description QTY
1 WS OR 147 Front beam for 14' Cable Truss System 1
2 WS OR 37 Mid beam section - 8 ft. 6
3 WS OR 146 Cable truss support 1
4 WS OR 40 Beam splice - Standard 30 in. long 6
5 SP 457 Cable truss straps 2
6 SP 458 Cable truss wire ropes 1
7 SP 166 Cable truss straps 9f"with pins 1
8   5/8 inch Snap lock pin 4
9 WS or39
or
WS OR 44

Rear beam section for saddle style weights - 8 ft.

Rear beam section for longhorn style weights - 8 ft.

2

14' Reach Cable Truss System

3.6.2. Installation Procedure for 14' Reach Cable Truss System

  1. Installation and use of the 14' Reach Cable Truss System requires a clear space of at least 24' behind the parapet.
  2. Assemble two sets of Mid Beams (WS OR 37) and a set of Rear Beams using the 30" long Beam Splice (WS OR 40). Ensure that the snap lock pins are inserted completely and retaining clips lock the snap lock pins.
  3. Install one end of the Mid Beam with the Cable Truss Support by inserting the snap lock pin through the Mid Beam and Cable Truss Support. Insert the snap lock pin completely and secure with retaining clip.

  1. Install the Front Beam (WS OR 147) with the two front Mid Beams using a Beam Splice (WS OR 40). Insert the Snap Lock Pin completely and secure.
  1. Pin the Cable Truss Strap (SP 166) to the Front Beam at a hole located approximately 3 feet from the front of the beam using a Retaining Pin (SP 169). Pin the Cable Truss Strap (SP 457) to the Rear Beam (both the beams) as shown using Retaining Pin (SP 169).
  2. Install Cables (SP 458) to connect Cable Truss Straps and the Cable Truss Support.

  1. When moving the Cable Truss System into position ensure that the support for the front of the beam is located directly beneath the support feet of the Cable Truss Support. Do not support the Cable Truss System on either side of the Cable Truss Support as this places the load on the aluminum beam and not on the Cable Truss Support and can damage the aluminum beam.
  2. Install the counterweights in accordance with the table below. If a Sliding Collar is used then the reach is determined by measuring the distance between the Sliding Collar and the Cable Truss Support vertical mast. Note that you cannot have reach less than 11'-6".

Counterweight Chart for Cable Truss System - 14 ft.

Maximum 1000 Lb. Load - Beam Extends 24' Inboard of Truss Mast
Reach (inch) 11'-6" 12' 12'-6" 13' 13'-6" Maximum 14'
(Sliding Collar Position from Base) 138 inch 144 inch 150 inch 156 inch 162 inch 168 inch
Counterweight (lbs) 2050 2100 2150 2250 2350 2400

Note:-

  1. Cable Truss Support must be supported on solid surfaces capable of carrying the applied load. Do not use insulating boards or other non-rigid materials under the Cable Truss Support.
  2. You must use a Sliding Collar (WSH 5) in order to work less than 14' reach. Install the optional sliding collar by inserting the Sliding Collar on the Front Beam.
York Scaffold Equipment Corp.
37–20 12th Street
Long Island City, NY 11101
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