Square Hollow Section Dimensions

31 Mar, 2026 | Latest News, Square Hollow Section

Picture of SHS Steel

Square Hollow Sections (SHS) power frames, posts, and modern designs with their perfect balance of strength and clean aesthetics. Unlike RHS, equal sides deliver uniform load resistance. Melsteel stocks primed/galvanised SHS in Melbourne. Use this exclusive size chart to spec your next project right.

Complete SHS Size Chart (AS/NZS 1163)

SHS lists as Side x Wall Thickness (e.g., 50×3.0), standard 6.5m/8m lengths. Melsteel cuts precisely.

Size (mm) Wall Thickness (mm) Weight (kg/m) Applications
20×20 1.6, 2.0 1.1-1.4 Light frames, furniture
25×25 1.6, 2.0, 3.0 1.4-2.5 Gates, screens
32×32 1.6, 2.0, 3.0 1.9-3.3 Balustrades
38×38 2.0, 3.0 2.7-4.0 Fencing posts
40×40 2.0, 3.0, 4.0 2.9-5.3 Small trusses
50×50 2.0, 3.0, 4.0, 5.0 3.6-6.9 Columns, pergolas
65×65 3.0, 4.0, 5.0 5.6-8.8 Gate frames
75×75 3.0, 4.0, 5.0 6.5-10.2 Structural posts
90×90 4.0, 5.0 9.0-11.2 Heavy fencing
100×100 3.0, 4.0, 5.0, 6.0 8.6-14.1 Building columns
125×125 4.0, 5.0, 6.0 13.4-20.0 Industrial frames
150×150 5.0, 6.0, 8.0 20.1-31.0 Large portals

Galvanised for outdoors, view galvanised SHS.

Select SHS Like a Pro

DIY/Light: 25-50×2.0-3.0mm for gates/pergolas.
Residential: 75-100×3.0-5.0mm for posts/extensions.
Commercial: 125x150x5.0mm+ for warehouses.

Match tip: Thicker walls for compression; lighter for tension (structural guide).

Melsteel Delivers SHS Ready-to-Build

Order cut-to-length, drilled, or fabricated (processing). Crane delivery Melbourne-wide (delivery). Drawings? Contact or call 03 8794 3100. Price list here.

FAQs: SHS Sizes

1. Top size?
50×3.0 & 100×4.0, versatile workhorses.

2. Custom lengths?
Yes, 50mm steps (services).

3. Galvanised best?
For exposure, rust-proof (benefits).

4. SHS vs RHS?
SHS uniform; RHS directional (confusion guide).

Where to Next

– RHS Chart

– Flat Bars

– Channels Guide

– Ordering Mistakes