Reference
Building Models
The model letter tells you how the building carries its load, which determines the span it can reach and how much of the floor you actually get to use. Everything else — size, doors, insulation, finish — is specified on top of that choice.
| Model | Profile | Span | Best for |
|---|---|---|---|
| A A Model | Compact full arch | 12' – 30' wide | Backyard storage, Single-vehicle garages |
| B B Model | Straight sidewall | 20' – 60' wide | Two-car garages, Shops with wall benches |
| C C Model | Small-span arch | 10' – 16' wide | Garden and tool storage, Mower and ATV shelters |
| R R Model | Low-profile round arch | 16' – 30' wide | Height-restricted lots, Boat and RV covers |
| S S Model | Straight wall with arched roof | 20' – 75' wide | Workshops, Barndominiums |
| T T Model | Wide-span structural | 40' – 100'+ wide | Aviation hangars, Warehouses |
| X X Model | High-clearance arch | 22' – 45' wide | Shops with vehicle lifts, RV and coach storage |
| M M Model | Cold-formed container roof | 20' – 40' between containers | Container covers, Jobsite shelters |
Arch Profiles
The arch is both frame and skin. Least steel per square foot, completely column-free inside, and the walls curve in at the base.
A Model
A tight-radius full arch built for smaller spans. The curve carries the load to the base without interior columns, so a modest footprint still gives you completely open floor space.
C Model
The smallest profile in the lineup — a compact arch sized for garden equipment, tools and seasonal storage where a full garage would be overkill.
R Model
A shallow, rounded arch that keeps overall height down. Useful where a height restriction, a covenant or a sightline matters more than headroom at the walls.
X Model
A taller, steeper arch that lifts the crown well above the door line. Built for the jobs where vertical clearance is the whole point — lifts, tall equipment, stacked inventory.
Straight Wall Profiles
Vertical sidewalls with an arched or sloped roof. Usable floor right to the wall line, and doors can sit in the sidewall.
B Model
Vertical sidewalls with a low-slope roof. Usable floor area runs right to the wall line, which makes this the practical choice when you are lining walls with benches, racking or parked equipment.
S Model
Straight vertical sidewalls carrying an arched roof — the hybrid that solves the classic quonset complaint. You get usable wall height for doors and storage, plus the clear-span efficiency of an arch overhead.
T Model
The heavy end of the lineup. Engineered for wide clear spans and long runs where nothing can interrupt the floor — aircraft, production lines, indoor arenas and bulk storage.
Container Roof Systems
Cold-formed roof spanning between shipping containers. The containers carry the load; the roof can be dismantled and relocated.