brackets 135 with 7 9 mm 5 16 in diameter bolts the support bracket 135 is fabricated from 4 8 mm 3 16 in thick bent plate and reinforced with gusset plates the 152 mm 6 in long 152 mm u00d7 152 mm u00d7 4 8 mm 6 in u00d7 6 in u00d7 3 16 in box beam rail sections 136 are welded to the support brackets to serve as blockout tubes to the posts as shown in fig5 the support brackets are in turn attached to the posts with 15 9 mm u215d in diameter bolts the post spacing between post nos 1 and 2 is 1981 mm 6 ft 6 in and the post spacing from post nos 2 to post 6 is 1219 mm 4 ft turning to fig6 it may be seen that a cable anchor assembly 114 is used to transmit the force from the box beam rail element 116 to the end post 1 the cable 117 is anchored to the end post 1 through a hole in the base of the upper section 1 a of the end post and attached with a cable anchor bearing plate 116 washer and nut the other end of the.