Radius of Gyration: Formula, Meaning and Worked Example
The radius of gyration is a single length that describes how the area of a cross-section, or the mass of a body, is spread…
Architecture · Structure · Japanese Design
Architecture, structure, and the craft of building well.
Field notes by 仲谷仁孝 — on how good buildings are designed, engineered and made to last.
Architecture
Structure
Japanese Design
Construction
Renovation
Interior Design
Start with the cornerstones
Start here →Latest
All articles → 
Mass Moment of Inertia: Formulas and Worked Examples
The mass moment of inertia measures how hard it is to change the rotation of a body about an axis. It plays the same…
Rectangular Hollow Section, SHS and CHS: An Engineer’s Guide
A rectangular hollow section (RHS) is a closed steel tube with a rectangular cross-section, one of a family of hollow structural sections that also…
Universal Beam and Column Sections (UB and UC) Explained
A universal beam (UB) is a hot-rolled steel I-section with parallel flanges, produced in a standard range of sizes and used for beams in…
Risk Assessment Construction: Method and Singapore Rules
Every construction activity carries hazards: work at height, lifting, excavation, hot work, electricity, moving plant. A risk assessment construction teams carry out properly identifies…
Construction PPE: What Workers Need and Why It Matters
Personal protective equipment is the most visible part of site safety: the helmet, boots and vest that everyone on a building site wears. Construction…