A325 Structural Bolt Torque Specs

Astm a325 is an astm american society of the international association for testing and materials international standard for heavy hex structural bolts. Specification for structural joints using astm a325 or a490 bolts june 30 2004 supersedes the june 23 2000specification for structural joints using astm a325 or a490 bolts. Length is measured from under the head.

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Partially threaded screws come with precise threaded and unthreaded portions allowing you to place only the.

A325 structural bolt torque specs.

The bolt is stressed up to the proofload value and if there is no deformation elongation or fracture then the bolt is deemed to have passed. Astm a325 specifications technical menu posted on july 1st 2015 by vapro. Material meets astm f3125 specifications for quality. We are choosing to keep this technical information about the now obsolete a325 specification on our website for.

The f3125 specification is a consolidation and replacement of six astm standards including. Astm f3125 f3125m is a structural bolt specification covering inch and metric bolt grades. Astm a325 is an astm international standard for heavy hex structural bolts titled standard specification for structural bolts steel heat treated 120 105 ksi minimum tensile strength. Asme b18 2 6 covers dimensional standards for a325 heavy hex structural bolts rcsc.

Dimensions meet asme b18 2. Asme b18 2 6 covers dimensional standards for a325 heavy hex structural bolts rcsc. If you are working with a325 structural bolts on a regular basis we strongly recommend purchasing a copy of the astm a325 specification from astm international. The bolt torque table below provides information such as tension torque tpi for the heavy structured bolts against its corresponding bolt sizes ranging from 1 2 to 1 1 2.

1 proofload is the published number that full size headed bolts are tested to. These will be addressed in this article. Bolt size tpi tension min tension max tightening torque range ft lbs min max galv wax tightening torque range ft lbs min max plain. A325 a325m a490 a490m f1852 and f2280.

The research council on structural connections is a non profit volunteer organization whose research projects serve to provide safety. Prepared by rcsc committee a 1 specifications and approved by the research council on structural connections. The research council on structural connections is a non profit volunteer organization whose research projects serve to provide safety. It defines mechanical properties for bolts that range from 1 2 to 1 1 2 in diameter.

The most common heavy hex head screw these steel screws meet astm a325 regulations for structural joints such as mating i beams and scaffolding. This specification contains 4 inch series bolting grades. For bolting specifications that do not have a published proofload it is usually calculated at 92 of minimum yield strength. In 2016 astm a325 was officially withdrawn and replaced by astm f3125 in which a325 now becomes a grade under the f3125 specification.

A325 f1852 a490 and f2280. When looking at the mechanical requirements of bolts it appears that a grade a325 and sae j429 grade 5 are identical as do the. If you are working with a325 structural bolts on a regular basis we strongly recommend purchasing a copy of the astm a325 specification from astm international.