The results of four vehicle impact tests into metal beam guardrail using three types of posts and blocks are reported. The then current (1971) California Standard Plans for metal beam guardrail required 8" x 8" (203 x 203 mm) (nominal) D.F. posts and blocks. It was desired to determine whether (1) smaller sized wood posts and blocks could be used and (2) whether steel posts and blocks could be used in place of 8x8's in order to reduce guardrail costs and to obtain another permissible post material beside wood. It was concluded that 6" x 8" (152 x 203 mm) (nominal) D.F. wood posts and blocks were an acceptable substitute. Also W 6 x 8.5 (152 mm x 12.65 kgf/m) steel posts and blocks could be used provided W-section backup plates were used at alternate posts where no beam splice occurred and a positive connection was used at the end anchor cable in place of cable clips. All four tests were conducted using 4960 lb. (2260 kgf) passenger vehicles with nominal impact speeds and angles of 65 mph (105 km/hr) and 25 degrees respectively.
Dynamic Tests of Metal Beam Guardrail Series XXVII. Highway Research Report
1974
91 pages
Report
No indication
English
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