This code outlines the design, detailing, and execution of hot riveted or bolted connections in steel overhead water tanks. While hot riveting is largely obsolete in modern construction, this standard is crucial for the structural evaluation, maintenance, and repair of existing older steel tanks. It emphasizes connection requirements to ensure structural integrity and water-tightness under hydrostatic loads.
Specifies practice for hot riveted and bolted connections in steel structures of overhead water tanks.
Quick Reference Values
Minimum pitch of rivets/bolts2.5 x nominal diameter of rivet
Minimum edge distance (sheared edge)2.0 x hole diameter
Minimum edge distance (rolled or machine cut edge)1.5 x hole diameter
Maximum grip length of rivets8 x hole diameter
Standard clearance for rivet holes (diameter <= 25mm)1.5 mm
Practical Notes
Hot riveting is almost obsolete in modern practice; welding or high-strength friction grip (HSFG) bolts are now preferred for new tanks.
This code is highly valuable for forensic structural engineers assessing or retrofitting existing riveted overhead steel tanks.
Unlike standard structural framing, tank connections require specific caulking and often closer rivet pitching to ensure strict water-tightness.