Storage Tank Supports & Wind Girders

01 / 08

Inside a cone-roof tank

Cut away to show the roof structure. Tank diameter and girder sizes follow the tank designer’s calculations.

Scroll to see how it is built · drag to turn it round

02 / 08

Primary wind girder

The top girder keeps the shell round in wind and doubles as a walkway.

How is it possible at Allmarc?

Three-roll pinch cum pyramid plate rollsRolls plate up to 40 mm

Used here for: Primary wind girder

• Rolls plate up to 40 mm

All our machinery

Deratech Supera-H 12030 fibre laser20 kW

Used here for: Primary wind girder

In 2024 we were the only buyer of Deratech’s 20 kW, 12 m laser.

• 20 kW
• 12 x 3 m bed
• Pallet changer

All our machinery

03 / 08

Intermediate girder

A lower girder where the design calls for one, on brackets off the shell.

04 / 08

Rafters

Rafters from the crown to the shell, with ring girders between, cut and drilled in matched sets.

How is it possible at Allmarc?

Robotic H-beam cutting and bevelling cellBeams up to 1,000 x 500 mm

Used here for: Rafters

• Beams up to 1,000 x 500 mm
• 12 m long, 50 mm thick
• Hypertherm XPR 300

All our machinery

Kotec newRun10DX CNC beam drilling lineH-beams up to 1,000 x 500 mm

Used here for: Rafters

Heavy profiles that need precise holes, where plasma cannot do the job: the lower structure and panel borders of a ground flare, and every bolted PEB and multi-storey frame.

• H-beams up to 1,000 x 500 mm
• Drills 3 faces in one pass
• Channels, angles and box sections

All our machinery

05 / 08

Crown ring

The ring the rafters meet at, rolled and welded.

06 / 08

Centre column

A centre column with base and cap plates for larger roofs.

07 / 08

The tank

Shell and floor plates, shown for context.

08 / 08

A kit of parts

Girders, rafters, crown and column: every member numbered, match-marked and packed in erection sequence.