PEB frame type
Arched roof truss
A curved steel truss carried on built-up steel columns at both sides. A wide, column-free hall with a distinctive arched roof.
Overview
What is an arched roof truss?
Instead of a solid tapered rafter, the roof is a curved truss: a top and bottom chord joined by web members. The truss depth gives stiffness with relatively light members.
The curved profile suits buildings where the roof is part of the architecture and where a large open volume is needed under it.
Uses
When this frame fits
Sports and event halls
A large open volume with a roof that people see from inside.
Markets and community buildings
A landmark roof over a busy open floor.
Bulk storage
Open halls for loose or bulky materials.
Architectural roofs
Where a curved silhouette is part of the design brief.
Design
What our engineers check
- 01
Truss segments
The arch is fabricated in segments sized for containers and bolted together on site.
- 02
Supports and thrust
Column tops and foundations are checked for the forces the arch delivers.
- 03
Roof sheeting on a curve
Purlin layout and radius are set so the local roofing contractor can fix curved or crimped sheets.
- 04
Erection sequence
Lifting points and temporary bracing are planned for the long curved trusses.
Designed, made and delivered by one team
From your building size to a frame ready to erect
Send size and use
Width, length, height, location and any crane – we propose the right frame type.
Designed as a 3D IFC model
Every member of the building in one model, checked to international and Thai codes.
Made in our own factory
Cut, drilled, welded and painted in a certified factory.
Shipped CIF / DDP
To a Thai port or to your site, with full documents.
10 standard frames
Compare with other frame types
FAQ
Questions Thai clients ask us
Is an arched truss heavier than a gable frame?
Not necessarily – the truss depth makes it efficient – but it has more pieces and connections. We compare options for your span and use.
Do you supply the curved roof sheets?
World Steel Thailand supplies the steel structure and purlins; roof sheeting is by your local contractor, using our purlin layout.
Not sure which frame suits your building?
Send us your building size and use. Our engineers propose the frame type, steel weight and a CIF/DDP price for your site in Thailand.