Galvanized steel roof trusses against the sky

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Why steel

Light-gauge steel, plainly.

Galvanized sheet steel, roll-formed into studs, joists and trusses.

Properties

What steel brings to the frame.

  • Dimensionally stable
  • Noncombustible
  • No rot, mould or pests
  • High strength-to-weight
  • Precise & repeatable
  • Recyclable
Comparison

Steel vs. timber.

Light-gauge steelDimensional timber
ConsistencyUniform, made to the modelNatural variation
MoistureNo shrink or swellShrinks as it dries
CombustibilityNoncombustibleCombustible
Pests & rotNot affectedNeeds protection
Off-site fabricationExcellentGood
ThermalPlan continuous exterior insulationLower stud conductivity
Design considerations

Plan for these.

C-01

Thermal bridging

Use continuous exterior insulation.

C-02

Corrosion

Heavier coating for coastal exposure.

C-03

Engineering

Coordinated with your engineer of record.

C-04

Acoustics

Tested assemblies for party walls and floors.

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