The Structural Engineer > Archive > Volume 60 (1982) > Issues > Issue 3 > Comparitive Tests on 8.8 and HSFG Bolts in Tension and Shear
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Comparitive Tests on 8.8 and HSFG Bolts in Tension and Shear

In connection with the drafting of the Code of Practice to succeed BS 449, two distinct problems were revealed relating to bolt strengths. The current values for 8.8 bolts in direct tension appeared disproportionately low having regard to ultimate tensile strength (UTS) values, compared to general grade high strength friction grip (HSFG) bolts. Also, no guidance is currently given on the ultimate shear values of general grade HSFG bolts,. although the use of a load factor of 1.4 against slip must imply that such bolts possess further capacity after slipping into bearing. M.H.R. Godley and F.H. Needham