What is supported scaffold?
Supported scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid support. Requirements specific to the other scaffold types are described only in their respective modules.
What is the standard of scaffolding?
The key elements of the scaffolding are the standard, ledger and transoms. The standards, also called uprights, are the vertical tubes that transfer the entire weight of the structure to the ground where they rest on a square base plate to spread the load.
When dismantling a scaffold All work should be conducted?
Erection, alteration and dismantling of all scaffolding structures (basic or complex) should be done under the direct supervision of a competent person. Platform area: minimum 350 mm wide x 300 mm deep, including the ladder rung if it is at the same level as the platform.
What is the maximum height for scaffolding?
The height of the toprail for scaffolds manufactured and placed in service before January 1, 2000 can be between 36 inches (0.9 meters) and 45 inches (1.2 meters).
What is the minimum height for scaffolding?
In the general industry, the height requirement for scaffolding is 4 feet above a lower level. For construction work, the height requirement is 6 feet above a lower level. All workers 10 feet above a lower level must have fall protection.
Is it illegal to work on a roof without scaffolding?
Roofing repairs do not always need to be done by a professional but they nonetheless pose difficulties when it comes to both access and safety. Much of the official health and safety advice states that, for any domestic roof repairs, scaffolding is needed.
What is the height to base ratio for scaffolding?
two to one
At what height must scaffolds be guyed tied or braced?
A platform width of three feet or less must have guys, ties and braces every 26 feet or less. When the 4:1 height ratio is reached guys, ties and braces are to be installed at each end of the scaffold and at horizontal intervals not to exceed 30 feet vertically.
What is height to base ratio?
[aerial photography] In aerial photography, the distance on the ground between the centers of overlapping photos, divided by aircraft altitude. In a stereomodel, base height ratio is used to determine vertical exaggeration.
How high can you stack Perry scaffold?
18 ft.
What is the maximum permissible gap between scaffold planking?
one inch wide
When must scaffold frames be pinned or secured together?
2) Scaffold frames must be pinned together to prevent uplift. 3) Bent frames should only be used at the end of a scaffold run.
Is a harness required on scaffolding?
For scaffold work, employees must have fall protection when working at a height of 10 feet or more above a lower level. Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses, positioning device systems and fall restraint systems.
When a worker displays a lack of skill understanding or proficiency when using scaffolds?
When the employer has reason to believe an employee lacks the skill or understanding needed for safe work involving the erection, use, or dismantling of scaffolds (1926.454(b)), the employer shall retrain the employee.
At what intervals must a 5 foot wide scaffold be tied into a structure?
Scaffolding becomes more unstable as you build it taller. According to OSHA, the scaffolding must be tied off at specific intervals as you go vertically up the wall. For the purposes of this post, “tie off” includes (guys, ties and braces). 5′ wide, the initial tie off must be at 20′.
What is the minimum amount that a scaffold plank may project beyond its support?
Limiting the distance that a plank can extend beyond its supporting ledger to 300 millimetres (12 inches) discourages workers from using the extended area as part of their working platform.
How do you stabilize scaffolding?
Once the scaffolding is assembled and in place, double-check that it’s level and resting securely on all four base plates or casters. If it rocks, readjust one of the screws to stabilize the scaffolding. Use the built-in ladders to climb the scaffolding. Don’t climb on the cross braces.
What types of scaffolds are not allowed in construction?
(j) Prohibited Types of Scaffolds. Lean-to or jack scaffolds, shore scaffolds, nailed brackets, loose tile, loose brick, loose blocks, stilts, or other similar unstable objects shall not be used as working platforms, or for the support of such platforms.
What size hole requires a cover?
6 feet