If the structure of the scaffold or its surrounding area have been altered, or if weather conditions change, it should be re-inspected. Support devices must support 4 x imposed load Although they may not get the attention they deserve from the workers who use them, the people who are responsible for those workers’ safety recognize the danger. An estimated 2.3 million construction workers, or 65 percent of the construction industry, work on scaffolds frequently. Safety Advisor, Design and Construction. Check the hazards at the beginning of every shift In this Guide the scaffolding contractor is the person responsible for installing, constructing and commissioning scaffolds. Any bracing must be properly secured to ensure that it will not become loose once under stress. Supported scaffolds are required to be plumb and braced. The only foundation that does not need a mud sill is concrete. The first rung or bottom rung of the ladder must be a maximum of 24 inches from the ground or walking working surfaces. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. Walkways and work platforms shall be a minimum of 18 inches wide. It is suggested many times that a screw jack can only be raised 12 inches. Supported scaffold poles must bear on firm … a. (2) You must make sure supported scaffold poles, legs, posts, frames, and uprights, bear on base plates that rest on: (a) Mudsills; or (b) Other firm foundations such as concrete or dry, compacted soil. Construction sites are places of constant change. Prior to assembly, a qualified person must design the scaffold and set the specifications for using it. timber scaffolds must be rattan or such other material as approved in writing by the chief inspector. One reason is that OSHA demands it. They’re one of these most common features on construction sites and in industrial settings — and one of the most inherently dangerous. A firm foundation, such as a flat, level concrete slab, is an adequate surface for a base plate. However, most of the concepts and counsel incorporated here also applies to other types. 1926.451(c)(2)(i) and (ii) Restraining. Supported scaffold poles, legs, posts, frames, and uprights shall bear on base plates and mud sills (or other adequate firm foundation). Subscribe to our newsletter and stay informed. That isn’t the case. Foundations. Andre Abajian or SoCal Removals designated competent scaffolding person is responsible for ensuring the following engineering controls, training requirements, and safe work practices are enforced to protect our employees from ha… That’s why proper training is critically important for every worker who erects, inspects, maintains, or uses scaffolding on a worksite. Concrete is the lone exception to this rule, which, because of its structural properties and strength, … Another thing that should always be maintained is the proper height of the top rail. Cross braces will not go on as easily or at all, and if the scaffold is leaning out of plum and a load is set on top the chances of it overturning are dramatically higher. In addition, scaffolding hazards vary with the nature of the tasks being performed and the operating environment. Ladder jacks must be designed and constructed to bear on the side rails and ladder rungs. such as tie-ins, as the assembly progresses. Scaffolds can be built on catwalks, on the space shuttle and anything else that someone may have to work on. A Competent Person shall be available on site at any time scaffolding is in use in the event conditions change or the scaffolding is moved or modified. Those responsibilities include ensuring that they are erected, moved, dismantled, and maintained properly, and that all workers who perform tasks on the scaffold fully understand the correct safety procedures. That brings us to screw jack height. If the scaffold needs to be tied into the structure, proper procedures must be followed. In OSHA’s eyes, if you fail to document that you performed the inspection and placed the tag, that never took place. A scaffold that was safe a month ago may have become unsafe because of something that was constructed nearby, or because of a task that is now being performed in an adjacent area. Unless the manufacturer specifically indicates that the components are compatible and can work together, don’t mix them. 22.B.12 Scaffolds shall be plumb and level unless engineered and designed to contour as the structure does. That’s especially true when workers are using metal strapping or tools in close proximity to the lines. Even the most carefully engineered and assembled scaffold will be unsafe if it doesn’t have a firm foundation. as a midrail, it must be between 20 inches (0.5 meters) and 30 inches (0.8 m) above the work platform. Work Practices Safe work practice training by a Competent Person must be given to workers who erect, dismantle, move, operate, repair, maintain, inspect, and use scaffolding. Learn More, By Jordan Hollingsworth, MS, ASP, CHST, CHSP, CRIS® Under construction, damaged) . D. Suspension Scaffolds • Before a scaffold is used, the competent person shall evaluate all direct connections. They need to be made aware of correct use of the scaffold and how to handle materials and tools when working on it. Workers who are accustomed to scrambling up the side braces during assembly are often surprised by (and resistant to) that requirement. Failure to do so makes the scaffold less stable and, while it may not topple, it may sway or move enough to knock someone off the platform. Ask us about our NEW state-of-the art mobile training. Any bracing must be properly secured to ensure that it will not become loose once under stress. Every other foundation must have a base plate or screw jack and mud sill. In other words, you can’t take a frame scaffold and just set it on the ground or even on concrete. Icicles that form on portions of the structure above the scaffold may thaw and suddenly drop on workers. An adequate foundation is one that, like base plates on mud sills, will prevent the scaffold from settling into the ground. Now, hopefully you already knew all of this, but as you know, the three steps to remembering are Repetition, Repetition, Repetition! An “adequate foundation” is what OSHA says that every scaffold must have. There are many different foundations out there; there could be dirt, rock, mud, water, asphalt, grass, a roof, a metal top to a tank or concrete. 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