Scaffold Flashcards
A suspension scaffold consisting of a platform essentially supported by horizontal and parallel ropes with a vertical pick-up is a?
Catenary scaffold.
When using scaffolding boards, the space between the boards cannot be more than:
1 inch
Scaffold platforms and walkways shall be at least how wide?
18 inches
The maximum distance from the face for outrigger scaffolds shall be:
3” inches
Each end of a platform must extend over the centerline of its support at least:
6” inches
A scaffolding platform longer than 10 feet shall not extend over its support more than:
18” inches
Overlapping scaffolds must overlap each other by:
12” inches
Wood platforms may not be painted so as to cover the wood finish, but they can have:
Wood preservatives and slip-resistant finishes applied
Scaffold components manufactured by different manufacturers:
Shall not be intermixed
Scaffolds must be assembled:
As per manufacturer’s recommendations
Supported scaffold poles shall bear on:
Base plates and mud sills
Defective ropes on scaffolds shall be:
Replaced
When hook-on and attachable ladders are used on a supported scaffold more than 35 feet high, they shall have rest platforms at what maximum vertical intervals?
35’ Feet
Steps accessing a scaffolding platform shall have a minimum width of:
16” inches
The minimum clearance between scaffolds and insulated power lines with less than 300 volts shall be:
3’ Feet
Employees shall be prohibited from working on scaffolds covered with snow, ice or other slippery material, except?
For removal of such materials
Scaffolding platforms shall not deflect more than how much of the span when loaded?
1/60
Each employee on a scaffold must be protected from falling when the scaffold is how far above the lower level?
10 Feet
Guardrail systems shall be installed:
Along all open sides and ends of platforms
What is the MINIMUM height for guardrails on scaffolding manufactured after January 1, 2000?
38” inches
With Pole scaffolds when platforms are being moved to the next level:
Leave the existing platform undisturbed until new bearers have been set
All ladder jack scaffolds shall be limited to light duty and shall not exceed a height of how many feet above the floor or ground?
20’ Feet
Wire ropes on catenary scaffolds shall:
Be continuous and not have splices between anchors
Scaffold casters and wheels shall be:
Locked with positive wheel and/or wheel and swivel locks
Who may supervise the erection and disassembling of scaffolding?
Only employees who are trained and qualified
Float or ship scaffolds shall not be used to support more than how many people and a few light tools?
750 LB
What is the MAXIMUM permissible span for a 2 x 10 full thickness undressed lumber plank with a working load of 25 psf?
10’ Feet
Scaffold components must be able to support what without failure?
Its own weight and four times the maximum intended load
Each ladder jack scaffold, top plate bracket scaffold, roof bracket and pump jack must be at least how wide?
12 inches
What is the maximum horizontal distance from the front edge of a scaffold platform to the face of the work unless guardrail systems are erected along the front edge and/or personal fall arrest systems are used?
14 inches
When scaffolding platform are _______ above or below point of access a ladder or stairs must be used not the cross bracing?
2 feet
Each employee on a single-point or two-point adjustable suspension scaffold shall be protected by?
Both a personal fall arrest system and guardrail system
When horizontal lifelines are used for fall protection on a scaffold, what are they secured to?
Two or more structural members
Scaffolding crossbracing is acceptable in place of a midrail when the crossing point of two braces is between _______ and _______ above the work platform?
20” to 30” above the work platform
Scaffolding crossbracing is acceptable as a toprail when the crossing point of two braces is between ______ and ______ above the work platform?
38” to 48” above the work platform
A toeboard shall be erected along the edge of platforms more than 10 feet above lower levels. A toeboard must be at least _____higher than walking surface with no more than a _____ clearance above the walking surface.
3.5 inches in height with 1/4” maximum clearance
Midrails, screens, mesh, intermediate vertical members, or equivalent intermediate structural members shall be installed between the top edge of the guardrail system and the walking/working surface when there is no wall or parapet wall at least?
21 inches high
What is the relationship of bearers and runners when using pole scaffolds?
Bearers shall extend a minimum of 3 inches over the outside edge of runners
There is a crawling board (chicken ladder) that runs from the eave to the roof peak. What is required at the end of the crawling board?
Ridge hook
Catenary scaffold can have no more than how many platforms?
2 Platforms
Guardrail systems shall be capable of withstanding, without failure, a force of at least ________ applied within 2 inches (5.1 cm) of the top edge, in any outward or downward direction, at any point along the top edge.
200 pounds
Safety nets shall be installed as close as practicable under the walking/working surface on which employees are working, but in no case more than _________ below such level.
30 Feet
Where scaffolds must be used in areas that the employer can demonstrate are so narrow that platforms and walkways cannot be at least 18 inches (46 cm) wide, such platforms and walkways shall be as wide as feasible, and employees on those platforms and walkways?
Shall be protected from fall hazards by the use of guardrails and/or personal fall arrest systems.
What is the maximum scaffold working distance from the face for plastering and lathing operations?
18 inches
What is the first thing you do when setting scaffolds closer than the minimum distance allowed to a power line?
Notify the power / utility company
Diagonal bracing in both directions shall be installed across the entire outside face of all?
Double- and Single-pole scaffolds
The maximum space between intermediate ties on scaffold with a 36” base?
26’
