It’s common to see the beam outreach either out or in too far with the wrong size roller bumper. Relatively easy question – I hope you answered d. Question: What determines the position of a suspended scaffold in relation to the work surface? Size – Size really matters when it comes to spacing angulated ropes and platform to the wall surface.They are durable, long lasting, and can be used on almost all surfaces. Today the most common type material used is the same as your boat bumper. OSHA 1926 Appendix E, Subpart L requires the roller to be a nonconductive material when welding. Required – The type of work being done may mandate the material used.Non-marking – Certain wall surfaces like marble require you to use a non- marking roller in order not to have buff marks left along facades where the platform and roller bumper hit.Hard Surfaces – Normally a hard material or a wheel on some type of Roller Bumper is used.Glass– When working on a glass surface normally a very thick soft type roller is used that cushions the platform should it contact the glass.Manufacturers often make different type rollers for different types of wall material it’s common to see the wrong type of roller on the wrong wall surface. This can be true but not very common.Īlthough roller bumpers purpose is the same, the material they are made of can be quite different. Again, ensure the connection is sound to prevent dislodgement.Īnswer e. Caution must be taken that they do not create a trip hazard if mounted on the toe board in the middle of the stage. They normally attach to the platform underneath or near the end of the platform and can be pushed out or back in as the building façade changes. Telescopic roller bumpers are being used more due to setbacks and slopes on building facades. Some are adjustable to fit the contour of the turbine blade as the pitch increases and decreases toward the blade tip.Īnswer d. Today with the wind industry being part of the scaffold and access market, we can have multiple sets of rollers. Here is a classic example of the abuse they take and why they must be secure. Normally you mount rollers on the toe board of the platform, then clamp them down to prevent accidental dislodgement to prevent it dropping on someone below. We can rule out a because it is only there to be confusing.Īnswer c.

However, there are different types of roller bumpers which can make c, d, and e legitimate answers. If you have taken the suspended CPT test, you better have answered b. Their purpose is to help keep the platform stable to prevent damage to the structure and to guide the platform as it is moving.

Roller bumpers are a suspended platform guide roller designed to contact the outer face or wall structure or building. There are two things all these answers have in common-definition and purpose. Between the wire rope and the structure.Question: Where are roller bumpers located? So what is the one question on roller bumpers? OK, pop quiz. Questions on spacing, platform to wall surface, and angulated wire ropes directly depend on this abused component. While the Scaffold & Access Industry Association swing stage competent person training (CPT) course has more than 100 questions, there is only one that directly relates to roller bumpers, despite the fact several other questions relate to them.

Swing stage scaffold definition