Work with our consultant to learn what to alter. Read more. NASM Flashcards Which of the following is the process of getting oxygen from the environment to the tissues of the body?
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Proper preplanning and appropriate controls help make sure the scaffold is erected safely and used properly. This includes:.
It is important to know how to identify defects in planks. Common defects of scaffold planks are:. While the employer is ultimately responsible for all the provisions mentioned above, the supervisor has a vital role to play in the safety of their teams. Scaffolding rules are complex, which is why OSHA requires they be erected under the supervision of a Competent Person somebody with both the knowledge to recognize a hazard and the authority to correct it.
The rails are a part of the system and pop easily into place. System scaffolding set up by a professional scaffold company or properly set up by your own personnel includes the necessary rails as well. Masonry scaffolding, on the other hand, is often assembled incorrectly. Masonry scaffolding is made up of components — uprights, outriggers, cross braces, base plates.
What is not included is mudsills, planks, or railings. Often, providing these pieces is left up to the company erecting the scaffold. Rails usually consist of 2 x 4s wired to the upright. These are oftentimes not even installed or not completed properly, making them unsafe. One of the most frequently cited issues with railings is that the ends of scaffolding are left unprotected. Companies will spend time to ensure the length of the scaffold is protected behind the workers, but forget to enclose the width of the scaffold, front to back on each end, leaving a fall hazard unprotected.
This is only partially the case. The regulations state [29 CFR If they cross between 20 and 30 inches from the walking surface, they can serve as a mid-rail. If they cross between 38 and 48 inches, they can serve as a top rail. NEVER both as it would be impossible for the two straight cross braces to cross in more than one location. Using external ladders is an approved way to access a scaffold, but there are some critical safety factors to take into account.
Other factors are contained in Subpart X, which describes the proper construction and use of ladders. Here, the most cited violations include:. So while the use of ladders is allowed, it requires a qualified, competent and designated user before it can be considered as a safe means of access. Frame scaffolds have prefabricated ladder frames that have been designed for access to the next level. This way, there is no need for external ladders which could be misused or might destabilize the scaffold.
For that reason, using scaffolds with prefabricated ladder frames is the easiest way to let users access the scaffold safely. Walk-through frames The conventional walk-through frames are designed for easy movement between sections. For vertical access, small ladder rungs at least 8 inches long are fitted on either side of the scaffold frame.
Users can hardly fit both feet on these rungs, which increases the risk of slipping exponentially.
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