| 摘要 |
A tubular dunnage bar of rectangular cross-section has an inner wall, an outer wall and two side walls. The inner wall has a slot extending lengthwise of the dunnage bar. A channel extends lengthwise within the dunnage bar. The channel has a bottom wall spaced from and parallel to the inner and outer walls of the dunnage bar and side flanges secured to the side walls of the dunnage bar. The channel and the inner wall of the dunnage bar form a pocket. A dunnage strip is received in the pocket and has a nose projecting outwardly through the slot. The channel and the side walls and outer wall of the dunnage bar form a space. The bottom wall of the channel has a trough-shaped, strengthening portion displaced downwardly into the space. The trough-shaped portion of the bottom wall of the channel is arcuate in cross-section and is located midway between the side flanges of the channel. The space formed by the channel and the side walls and bottom wall of the dunnage bar is completely open and devoid of structure except for the trough-shaped portion of the bottom wall which projects downwardly into it.
|
