Q. What is the grade of an HSFG bolt?

Answer

Property classes 8 and 10 from ARE 1367 Part 8 are appropriate for HSFG bolts, hence 8.8 and 10.9 bolts can be utilized. Since they have been approved for use in road bridges under IRC regulations, a user can put them to good use. Before HSFG bolts can be used for the same, the applicable codes will need to be modified to include clauses referring to the design of HSFG bolts for railway loading. The standards are based on the IS and EN norms, with some adaptations made to fit the needs of Indian railways.