Lastly, the nut or bolt-head of the bolt holding sections together obstructs, to some extent, the brace opening and brace tread surface where it protrudes above its horizontal brace. Unobstructed space, either in the between-brace openings or on the horizontal braces, themselves, does not line up. Also, they obstruct the openings between horizontal braces at different angles and different heights. They intersect the top and bottom horizontal braces at different distances from the side rails. The other truss obstructs the opening directly below the one created by the joined sections.įrom your illustrations, it appears the Non-Stop truss and trident-shaped truss configurations are different from each other in several ways. When sections are bolted one atop another, the trident-shaped truss obstructs the opening made between the top brace of the lower section and the bottom brace of the higher section. The trident-shaped truss appears to form the top anchor for bolting sections together. Attached to the bottom brace of all extension tower sections is a trident-shaped truss. This additional bracing appears to form the bottom anchor for bolting the sections together. Judging from the illustrations, tubular trusses fall approximately at the middle and top openings of each scaffold section.Īt the top of each section there is additional vertical and diagonal bracing between the truss and the horizontal brace. Every 4'-6" vertically there is a diagonal tubular truss welded into the opening between horizontal braces. These braces are 12 inches long and run between the scaffold section's vertical rails. The braces are spaced 9 inches apart vertically. We assume that these short sections are similarly configured and are used atop base tower or extension sections.Īs described, Non-Stop scaffold sections are built using a ladder-type frame with horizontal braces. Apparently, 4-foot 6-inch extension sections are also available. It appears from the Non-Stop materials that your scaffold towers are comprised of a 9-foot tower base section and one or more 9-foot extension sections. This response is based on the Non-Stop materials provided in your letter. Although no engineering drawings were included with your letter, you included descriptive information about Non-Stop scaffold tower configurations and dimensions as well as illustrations ("Non-Stop materials"). In your letter, you refer to two horizontal brace "openings" in the Non-Stop scaffold tower structure, and to requirements in §1926.451(e)(6) for integral scaffold access frames. Non-Stop scaffold towers do not comply with OSHA's integral prefabricated scaffold access frame or ladder/stairway type access requirements. scaffold towers comply with OSHA requirements? We apologize for the long delay in responding.įor clarity, your concerns have been rephrased as the following question: Do the integral, prefabricated access frames of Non-Stop Scaffolding, Inc. This is in response to your letter of June 5, 2001, addressed to Dale Cavanaugh, OSHA Region X, requesting OSHA "provide input …to help keep safe." The Region forwarded your letter to the Directorate of Construction for response. Re: Non-Stop scaffolding access frames §1926.451(e)(6) and (7)
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