Step ladder construction
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United States of America Patent
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-
Dec 4, 1990
Grant Date -
N/A
app pub date -
Nov 27, 1989
filing date -
Nov 27, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A step ladder construction is provided comprising a plurality of steps extending between a pair of struts. Coupling means join each of the steps with the pair of struts. Each of the struts has the shape of a channel with a pair of spaced webs between which the steps are received. The coupling means includes at least one flange element formed on one of the strut and the step, at least one surface defined on the other of the strut and the step to abut the flange element and fastening means to fasten the step to the strut with the flange element against the surface. The fastening means constitutes means to maintain the flange element against the surface while the flange element constitutes means to transfer a substantial portion of loads appearing on the step to the strut to reduce the shear loads appearing on the fastening means.
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