No worker shall enter a suspended platform, work cage, or bosun’s chair until they are tied off in a safe manner according to all federal, state, provincial, regional, and local standards/regulations. Counterweights used to balance adjustable suspension scaffolds must be capable of resisting one of the following [29 cfr 1926.451 (a) (2)]: 250 lb ÷ 55 lb = 5 counterweights
Suspended scaffolds Alquiansa
Counterweight, rigging, roof rigging, steel.
L = load capacity of hoist.
The weight of the scaffold and its occupants must be supported by both the structure to which it is attached and by each of the scaffold components that make up the anchorage system. Always use taut tieback wire ropes capable of holding the. Suspended scaffold outrigger beams must be stabilized to the floor or deck by either of the following [29 cfr 1926.451 (d) (3)]: Counterweights must be a nonflowable material, and they must be attached to the outrigger beam.
Suspended scaffolding & rigging solutions 108 spider® | www.spiderstaging.com | spider@spiderstaging.com | phone:
3 uly 2014 guide to suspended (swing stage) scaffolds supply suppliers should get and keep written confirmation of the following: Anhorage the safe use of a suspended scaffold begins with secure anchorage. All rigging devices must be securely tied back. If your platform configuration varies from this, contact spider product support to verify if your hoist rated capacity will be adequate at the different platform weight.
Sky climber swing stage 50 lbs.
B = backspan distance (distance between the fulcrum point and the center of the counterweights) 4 = safety factor (4: A suspended scaffolding system involves a working platform that hangs from an overhead structure. Suspended scaffolding & rigging solutions 110 spider® | www.spiderstaging.com | spider@spiderstaging.com | phone: In this situation the suspended scaffold (load force) is hanging at the front, the counterweights (effort force) are at the back and the fulcrum is in between.
• aluminum construction for strength and durability.
Is a unique, patented solution incorporating a movable counterweight in a suspended scaffolding/working platform or formwork, providing a safer, innovative way to access the underside of bridges, viaducts or other similar structures. Counterweights = (4) x (rated hoist capacity) x (reach) (backspan) Counterweights = (4) x (rated hoist capacity) x (reach) (backspan) Counterweights should be made only of nonflowable material and permanently marked with their weight.
Counterweights reach backspan tieback counterweights 74” 750 1000
As a minimum of 250 lbs. All rigging devices must be securely tied back. Bolts or other direct connections to the floor or deck. • easy to transport and install.
The rated load capacity of the rigging equipment supporting the suspended load must be equal to or greater than the rated capacity of the hoist.
For each occupant of a suspended platform. The load required by the counterweights is determined by dividing the resisting force by the distance on the beam from the centre of counterweights to the fulcrum (l). Counterweights used to balance adjustable suspension scaffolds must be able to resist at least 4 times the tipping movement imposed by the scaffold operating at either the rated load of the. The dead weight of the platform comprises all items from the rigging point shackle down, including
Cw = w x sf x b a where:
Assuming the counterweights are 55 lb each, here are the number required. A suspended scaffolding system is ideal in situations where tall structures are involved. However, other means can also be adopted, such as metal chains. Used with top rigging on a suspended scaffold.
• modular structure provides a wide range of setup and outreach up to 14 ft.
Beam section length, 8 ft. This is called a first class lever. • properly calculate the counterweights for outriggers when used. • securely fasten counterweights to the outrigger beam.
Tieaks tiebacks must be secured to a structurally sound
Couplers supplied for use with suspended scaffold have been. These suspended scaffolds are normally supported on all four sides with ropes. Counterweight displacement changes the location of scaffold’s centre of gravity and induces a. Direct connections to roofs and floors, and counterweights used to balance adjustable suspension scaffolds, shall be capable of resisting at least 4 times the tipping moment imposed by the scaffold operating at the rated load of the hoist, or 1.5 (minimum) times the tipping moment imposed by the scaffold operating at the stall load of the hoist, whichever is greater.
The suspended scaffold system has been designed in accordance with as/nzs 1576.1:
W = the load on each outrigger beam sf = safety factor (4x)
