How to Design a Swimming Pool Structure to IS 456 (Step by Step, With Free Software)
A swimming pool's wall has to be checked in both directions a tank wall never needs — full (water pressure…
How to Design an Elevated Water Tank to ACI 318 (Step by Step, With Free Software)
An elevated tank's real governing challenge usually isn't the tank container itself — it's the supporting staging (the tower of…
The Big Dig Ceiling Collapse: When an Epoxy Anchor Wasn’t Designed for Its Actual Load
A Sudden Failure in an Already-Operating Tunnel In July 2006, a section of suspended concrete ceiling panels collapsed inside a…
How to Design an Underground Water Tank to IS 456 (Step by Step, With Free Software)
An underground tank has a load case that never applies to any tank sitting above grade: the empty-tank flotation/uplift check,…
The Teton Dam Failure: Why Piping Through an Earthen Dam Is So Hard to Catch in Time
A Nearly New Dam, Failing During Its First Filling The Teton Dam in Idaho, completed in 1976, failed catastrophically during…
How to Design a Rectangular Water Tank to IS 456 (Step by Step, With Free Software)
A rectangular tank wall panel resists water pressure as a two-way slab fixed (or continuous) along its vertical and horizontal…
The Tay Bridge Disaster: Wind Load, Underestimated From the Start
A Bridge That Fell in a Storm, With the Train Still on It On the night of December 28, 1879,…
How to Design a Circular Water Tank to ACI 318 (Step by Step, With Free Software)
A circular tank wall resists water pressure primarily through hoop (ring) tension rather than vertical bending — the curved geometry…
How to Design a Compound Wall to IS 456 (Step by Step, With Free Software)
A compound (boundary) wall's governing lateral load is usually wind pressure on a solid panel, not retained earth at all…
How to Design a Basement Retaining Wall to IS 456 (Step by Step, With Free Software)
A basement wall is structurally a different animal from a freestanding cantilever retaining wall — it's propped top and bottom…