Products & services

Bolted steel frames

Bolted frames with tree-type moment or flanged connections; all cutting, welding and painting in the factory, and fast weld-free erection on site.

About this product line

Bolted frames are the complex’s core specialty. Every part is cut, drilled, welded, sandblasted and painted in the factory and only bolted together on site, giving uniform quality and short erection time. Our largest project, the 850-tonne frame of the Ghaem Hospital in Bushehr, was built this way.

Connections

Tree-type moment connections for multi-storey buildings
Flanged connections for shed frames
Pinned and moment connections for office buildings

Why bolted?

Weld quality of a factory environment
Erection several times faster than welding on site
Better resistance to earthquakes and heat
Can be dismantled and relocated

Examples

How we work

Six steps, one responsibility

Request a quote

01
Design & estimate

Reviewing architectural and structural drawings; calculating weight, schedule and cost.
02
Shop drawings

Fabrication drawings for every member and connection, before any plate enters the shop.
03
Cutting & fabrication

Cold, hot and CNC cutting; girders and columns built with submerged-arc welding and checked to size.
04
Blasting & painting

Surface preparation and anti-corrosion coating for the hot, humid southern climate.
05
Coding & delivery

Every part coded and delivered on a schedule matched to erection progress.
06
Erection & handover

Frame erection by our own crews, final inspection and handover to the client.