Alternating Tread Device Vs Ships Ladder

This stair saves space and you can go down face forward.

Alternating tread device vs ships ladder.

76 sanderson ave lynn ma 01902 call. The width of ship ladders is usually 24 and the tread depth is 6. Vertical rise between treads is generally around 9. Alternating tread stairs are preferred in many industrial and commercial applications by achieving vertical access with a shorter horizontal span than traditional stairs and greater functionality than traditional ladders.

Alternating tread ladder with platform. Ships ladders ship stairs ship ladder stairs alternating tread stairs fixed ladders are all terms that can get confused and sometimes used interchangeably. Available in steel. Easy assembly and quick ship available.

Alternating tread ladder crossover 2 alternating tread ladders connected by a platform industrial. This is an alternating tread stair. But for the purposes of this answer let s assume that the stair does have the same number of treads on both sides. The dimensions of ship ladders vary based on available space so they are always custom fabricated.

Precision s aluminum alternating tread stair is an alternative to a traditional ships stair. All alternating tread ladders have a 350 pound capacity. Let s look at how osha defines stairways alternating tread stairs ship stairs ship ladders and fixed ladders to understand the difference. These stairs allow the user to descend face forward giving a clear view of the floor below.

Most alternating tread ladder stairs have the same number of treads on each side which isn t absolutely necessary and i suspect it s based more on aesthetics than on construction or comfort. The riser height is reduced and the run is longer than a typical ship ladder but the steps alternate. Duvinage custom designs and fabricates alternating tread stairs to the highest industry standards. 800 244 6231 or 781 623 7970 fax for canada call today.

How do these devices differ from each other. The angle of the ladder is usually 60 70 and the design should use the shallowest angle possible within this range. Since the treads alternate this stair is not considered to be as safe as a standard ship ladder or spiral stair.