70x175x20 Steel Building Kit | Rigid Frame I-Beam | Commercial GradeJuly 22, 2026By 0 Comments 70’ x 175’ x 20’ | Clear Span I-Beam Construction. Roof Pitch: 1:12. ✔️ Roof & Wall Steel Panels. 📐 Building Specifications. ✔️ Primary & Secondary Framing. ⚠️ Final engineering is based onjob site location, exposure, and local building codes. Share This