| 摘要 |
A telescoping crane boom includes interfitting box sections fabricated by welding from plate stock. The side webs of the individual box sections are spaced inwardly from the longitudinal edges of the top and bottom webs, to allow placement of bearing pads substantially directly over and under the side webs of each box section in a multiple section boom. As a result, the side webs of the box sections are utilized as columns to absorb the heavy stresses transmitted through the wear pads and transverse stressing and flexure of the top and bottom webs is greatly minimized. The arrangement allows considerably lighter sections to be employed for the top and bottom webs of the individual box sections without fear of excessive transverse bending.
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