| 摘要 |
A reinforcing bar 90 comprising a reinforcing web 92 or strap attached by welding along a 5 substantial length of the drawbar arm 72b from close to the flat plate 74, under the front beam 40 and through to a position inside the footprint of the grid 30. An optional additional upper reinforcing bar 90 can be attached to the upper surface of the drawbar arms 72 where further load capacity is required. The reinforcing bar 90 further includes a transverse flange 94 set substantially at right angles to the reinforcing web 92 whereby the reinforcing bar 90 in cross 10 section is in the shape of an I, T or L, preferably a T. The transverse flange 94 is a more rigid and stiff member than the strap or web 92, is spaced from the drawbar arm 72b and extends generally parallel thereto and in a parallel plane to the underside surface of the drawbar arm 72b. However, at each end of the reinforcing bar 90 the transverse flange 94 ramps towards the drawbar arm 72b via a ramp section 91, the reinforcing web 92 tapers and the transverse 15 flange 94 meets with the drawbar arm 72b underside surface 78 in the form of a section of flat strap 93. Lr) C l |
