pvsoli.blogg.se - Catenary scaffold

To design pole scaffolds over 60 feet in height, and. A scaffold having a continuous platform supported by bearers suspended by wire rope from overhead supports, so arranged and operated as to permit the. Multi-point adjustable suspension scaffold means a suspension scaffold consisting of a platform (s) which is suspended by more than two ropes from overhead supports and equipped with means to raise and lower the platform to desired work levels. Sand, gravel and similar materials that can be easily dislocated shall not be used as counterweights. (d)(10) - Ropes shall be inspected for defects by a competent person prior to each workshift and after every occurrence which could affect a rope's integrity. Suspended scaffolding is a type of scaffolding that is suspended from the top of a building. Suspension ropes must be shielded from heat-producing processes.The height. Suspension ropes supporting adjustable suspension scaffolds must be a diameter large enough to provide sufficient surface area for the functioning of brake and hoist mechanisms. Įmployers must replace wire rope when the following conditions exist: kinks six randomly broken wires in one rope lay or three broken wires in one strand in one lay one third of the original diameter of the outside wires is lost heat damage evidence that the secondary brake has engaged the rope and any other physical damage that impairs the function and strength of the rope. ĭrum hoists must contain no less than four wraps of the rope at the lowest point. The standard prohibits using repaired wire. Also see, OSHA Standards and Interpretation Letter: - Scaffolds: Lifelines, support lines, and suspension ropes cannot have a common anchor point.

The suspension ropes must be long enough to allow the scaffold to be lowered to the level below without the rope passing through the hoist, or the end of the rope configured to prevent the end from passing through the hoist. Emergency escape and rescue devices must not be used as working platforms, unless designed to function as suspension scaffolds and emergency systems.

When lanyards are connected to horizontal lifelines or structural members on single-point or two-point adjustable scaffolds, the scaffold must have additional independent support lines equal in number and strength to the suspension lines and have automatic locking devices.

When using direct access, the surface must not be more than 24 inches (61 cm) above or 14 inches (36 cm) horizontally from the surface.

When scaffold platforms are more than 24 inches (61 cm) above or below a point of access, ladders, ramps, walkways, or similar surfaces must be used.

A competent person must inspect ropes for defects prior to each workshift and after every occurrence that could affect a rope's integrity.

Guardrails, a personal fall-arrest system, or both must protect each employee more than 10 feet (3.1 m) above a lower level from falling.

All suspension scaffolds must be tied or otherwise secured to prevent them from swaying, as determined by a competent person.

A competent person must evaluate all direct connections prior to use to confirm that the supporting surfaces are able to support the imposed load.

All support devices must rest on surfaces capable of supporting at least four times the load imposed on them by the scaffold when operating at the rated load of the hoist, or at least one-and-a-half times the load imposed on them by the scaffold at the stall capacity of the hoist, whichever is greater.

Employers must ensure that all employees are trained to recognize the hazards associated with the type of scaffold being used.

Some of the requirements for all types of suspension scaffolds include: