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