Alternating Tread Device Vs Ships Ladder
The riser height is reduced and the run is longer than a typical ship ladder but the steps alternate.
Alternating tread device vs ships ladder. The width of ship ladders is usually 24 and the tread depth is 6. Ships ladders ship stairs ship ladder stairs alternating tread stairs fixed ladders are all terms that can get confused and sometimes used interchangeably. Aluminum crossover ships ladder footprint 2 ships ladders connected by a platform alternating tread ladder calculate space requirements at various heights and angles. Alternating tread ladder crossover 2 alternating tread ladders connected by a platform industrial.
Easy assembly and quick ship available. Available in steel. 76 sanderson ave lynn ma 01902 call. 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.
But for the purposes of this answer let s assume that the stair does have the same number of treads on both sides. All alternating tread ladders have a 350 pound capacity. These stairs allow the user to descend face forward giving a clear view of the floor below. Let s look at how osha defines stairways alternating tread stairs ship stairs ship ladders and fixed ladders to understand the difference.
Duvinage custom designs and fabricates alternating tread stairs to the highest industry standards. Vertical rise between treads is generally around 9. Precision s aluminum alternating tread stair is an alternative to a traditional ships stair. 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.
This is an alternating tread stair. Since the treads alternate this stair is not considered to be as safe as a standard ship ladder or spiral stair. The dimensions of ship ladders vary based on available space so they are always custom fabricated. The angle of the ladder is usually 60 70 and the design should use the shallowest angle possible within this range.
Alternating tread ladder with platform. Aluminum ship ladder with platform. Alternating tread ladders available in a variety of sizes.