Uni-Rib™ Steel

UniRib steel panel

Uni-Rib™ Steel Panel – The better choice for steel siding and through-fastened roofs.

The Uni-Rib™ steel panel is exclusive to Lester Building Systems. It provides both structural strength and beauty to your building. 

  • Lester Buildings uses predominately 28 gauge steel for its UniRib steel panel.
  • Most post-frame suppliers use 29 gauge steel.
  • Some post-frame suppliers use 26 gauge commercial quality steel which is thicker, but has lower tensile strength.
  • Lester Buildings also offers 26 gauge steel in the same tensile strength as our 28 gauge steel.​
Tensile Yield Strength
  • Uni-Rib is a grade 80 steel with a minimum tensile strength of 80,000 PSI, often running well above that minimum.
  • Other building suppliers use a commercial quality steel with a maximum tensile strength of 64,000 PSI, and typically running much less.
  • The Uni-Rib grade 80 steel panel is stronger than commercial quality and Grade 56 steel panels.
  • Uni-Rib starts with a 42.000” wide coil giving you 2.75% more steel than most other steel panels, for the same 36” coverage.
  • This additional steel allows for more minor ribs, taller major ribs, and more and sharper bends in the ribs; giving you a stronger building.
  • The major rib in the Uni-Rib panel is 7/8” high while the major rib in many other steel panels is 3/4” high.

What is oil canning? 
Oil canning is the visible waviness in the flat areas of a metal panel and is not cause for rejection of the panel. The Metal Construction Association (MCA) explains oil canning in its Technical Bulletin, Oil Canning in Metal Roofs and Metal Wall Systems.

Unirib steel profile

Uni-Rib Steel Panel Gauge, Protective Substrate and Paint System Options