The Science of Saving Steel: Column Spacing Can Cut 10% of Tonnage

Moving columns from 7.5m to 9m cut total tonnage by 10%. Savings come from layout, not thinner steel.

Buyers often push price by asking for thinner panels or less steel. But the real savings live in the layout:

Column spacing: the economic range for portal frames is 7.5–9m. Many projects stick with a 6m habit and end up with too many frames. Moving one warehouse from 7.5m to 9m cut total tonnage by about 10% and reduced the foundation count too.

Structural form: light roofs without cranes can use simple-span purlins — no need for continuous-beam modeling and its detailing overhead. Bigger sections are for crane columns and high-seismic demands.

Member consolidation: standardizing similar members shortens fabrication changeovers and reduces site errors.

Layout optimization never touches safety — it just puts the money where it counts. That's what engineers are for.