Self-supporting curved steel roofing

K-Span Roof Panels

K-Span roof panels are roll-formed from galvanised steel into curved, interlocking sections that form a self-supporting roof without conventional internal rafters.

The final panel thickness, radius, span and fixing arrangement must be selected according to the project location, loading, supports, exposure and intended use.

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Curved K-Span galvanised steel roof panels

Panel Specifications

Typical technical characteristics used when considering a project-specific K-Span roof system.

Galvanised Steel

Hot-dip galvanised steel such as HDG S220 Z275 may be used, subject to the confirmed project specification.

Panel Thickness

Typical steel thickness may range from 0.5 mm to 1.0 mm, depending on span, loading, exposure and intended use.

Curved Profile

Typical effective panel coverage is approximately 305 mm, with a profile depth of approximately 150 mm.

How the Roof System Works

Straight steel coil is roll-formed into a profiled panel and then curved to the required radius. The finished panels are joined together to form a continuous self-supporting arched roof.

Curved steel panels form the structural roof
No conventional internal roof rafters are normally required
Panels connect together along their formed edges
The roof fixes at its base to suitable supports
Open-sided or enclosed arrangements may be considered
Final design depends on project-specific engineering

Typical Technical Range

These figures are general guidance only and are not a substitute for project-specific structural design.

Material Hot-dip galvanised steel, commonly HDG S220 Z275 or an approved project-specific equivalent.

Thickness Typically 0.5 mm to 1.0 mm, selected according to loading, span, exposure and intended use.

Panel Profile Approximately 305 mm effective coverage per panel and approximately 150 mm profile depth.

Span Guidance Potential spans may range from approximately 2 m to 24.4 m, subject to design, loading and support requirements.

Technical responsibility: Every structure must be reviewed for wind, snow, imposed loading, exposure, corrosion environment, supports, fixings, drainage, ventilation and intended use. Qualified structural input may be required before manufacture or installation.

Project-Specific Panel Selection

Panel thickness cannot be selected from span alone. The correct specification also depends on the site location, building height, exposure, support arrangement, intended enclosure and operational requirements.

Arch Span can review the initial project information and help establish the appropriate next technical steps.

Straight roll-formed K-Span steel panels

Project-specific K-Span steel roof panels

K-Span Roof Panel Questions

Are K-Span roof panels self-supporting?

The curved interlocked panels form the structural roof and normally do not require conventional internal roof rafters. Suitable base supports and fixings are still required.

What thickness of steel is used?

Typical thickness may range from 0.5 mm to 1.0 mm. The final selection depends on span, loading, exposure, location and use.

Can the panels be supplied in colour?

Natural galvanised steel is common. Pre-painted or coloured steel may be considered where suitable material is available and the project specification permits it.

Can roof panels be supplied without the supports?

Roof-panel-only supply may be considered. Supports, foundations, frames, walls, fixings, delivery and installation are separate unless included within the quotation.

What information is needed for a panel enquiry?

Provide the required width, length, postcode, intended use, proposed supports, photographs, preferred thickness and details of any walls, doors, ventilation or drainage requirements.

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Need K-Span Roof Panels?

Send the span, length, postcode, intended use and support arrangement for an initial project review.

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