Welded Aluminum and Railings

Regarding any aluminum railing project, it is imperative to understand the life-safety issue that arises when welding an aluminum railing post. A rail is classified as a life-saving fall guard for any elevation above 31 inches. The aluminum alloys normally used (such as 6061-T6) get their strength from a heat-treatment process. Welding weakens the heat-treated aluminum…

Steel Bolt Edge Distance Requirements

Per AISC-ANSI-360-10, the minimum edge distance for bolts is to follow the below table J3.4     https://www.scribd.com/doc/115942657/Minimum-Edge-Distance-Table-AISC-ANSI-360-10-Specifications-for-Structural-Steel-Buildings   or buy direct from AISC: https://www.aisc.org/store/p-1578-steel-construction-manual-14th-ed-fourth-printing-hardbound.aspx  

Metal Fasteners UNC vs Spaced Thread

Metal fastening is designed per the requirements of the American Institute of Steel Construction (AISC): Specification for Structural Steel Buildings in conjunction with the American Architectural Manufacturers Association (AAMA): TIR-A9-14 Design Guide for Metal Cladding Fasteners.   The (2) most common types of fastener threads used in construction are Unified Coarse Thread (UNC) more commonly…