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…
The Vajont Dam Disaster: A Dam That Survived While a Landslide Did the Damage
A Structurally Successful Dam, and a Catastrophic Geological Failure Around It The Vajont Dam in northern Italy, completed in 1960,…
How to Design a Gravity Retaining Wall to ACI 318 (Step by Step, With Free Software)
A gravity wall carries no reinforcement at all — its entire job is done by plain concrete mass, which means…
The Silver Bridge Collapse: How a Single Corroded Eyebar Brought Down a Highway Bridge
A Sudden Collapse During Evening Traffic On December 15, 1967, the Silver Bridge, an eyebar-chain suspension bridge carrying US Route…
How to Design a Counterfort Retaining Wall to IS 456 (Step by Step, With Free Software)
Past roughly 6 metres of retained height, a plain cantilever stem becomes impractically thick, and a counterfort wall's triangular ribs…
How Base Isolation Protects a Building by Decoupling It From the Ground
A Fundamentally Different Strategy Than 'Build It Stronger' Most seismic design strategy discussed elsewhere in this series — ductile detailing,…
How to Design a Cantilever Retaining Wall to IS 456 (Step by Step, With Free Software)
A cantilever retaining wall is checked against two entirely separate failure modes before a single reinforcement bar is sized —…
How to Design a Gantry Girder to Eurocode 3 (Step by Step, With Free Software)
EN 1993-1-1 has no crane-specific provisions at all — the true governing document is EN 1991-3, with its own detailed…
How to Design a Steel Column (Axial Member) to BS EN 1993 (UK National Annex) (Step by Step, With Free Software)
BS EN 1993's Ayrton-Perry buckling curve needs an imperfection factor selected from five named curves by cross-section shape, axis and…