Extraction of bolts and tensile test

Extraction of bolts or rivets of metal carpentry from pillars, beams or rods, to determine the steel mechanical characteristics (yield stress, tensile strength, and strain under maximum force). The sampling involves the removal of the connector to be tested by unscrewing the bolts where possible, or cutting with an angle grinder and removing the head of the bolt or rivet and subsequent sampling of the stem. A bolt with an equal section compared to the one taken is then repositioned.
After localizing and cataloguing the specimen with adequate photographic documentation, a tensile test at a state-authorized laboratory is finally carried out.

Technical standard of reference: UNI EN ISO 898-1; UNI EN ISO 898-2