Steel Truss Structure

Steel Truss Structure

Pre Engineered Buildings

Steel trusses are lightweight, high-strength frameworks composed of triangular units that provide exceptional span capabilities (30m to 100m+) for roofs, bridges, and towers. They optimize material efficiency while supporting heavy loads.

Types of Steel Trusses
By Shape & Design

Type  Description  Best For
Pratt Truss Diagonal members slope toward center  Bridges, industrial roofs
Warren Truss  Equal-length diagonals forming "W" Long-span roofs, aircraft hangars
Howe Truss Opposite of Pratt (diagonals slope outward)  Heavy vertical loads
Fink Truss   "W"-shape for shorter spans Residential & commercial roofs
Vierendeel Truss No diagonals (rectangular openings) Architectural aesthetics

  

By Connection Method

  • Bolted Trusses – Easy assembly, common in prefab structures.
  • Welded Trusses – Higher strength, used in heavy-duty applications.
  • Pin-Jointed Trusses – Allows rotation (common in bridges).

Key Components of a Steel Truss

  • Top Chord – Compressive force-bearing member.
  • Bottom Chord – Tensile force-bearing member.
  • Web Members – Diagonals & verticals distributing loads.
  • Gusset Plates – Connect members at joints (bolted/welded).
  • Bracing – Lateral stability (cross-bracing or knee bracing).

Advantages of Steel Trusses

  • Long Spans (30–100m+) – No intermediate columns needed.
  • Lightweight – Uses less steel than solid beams.
  • Prefabrication – Faster on-site assembly.
  • Design Flexibility – Curved, arched, or flat profiles possible.
  • Cost-Effective – Optimizes material usage.

Common Applications

  • Roofing – Stadiums, airports, warehouses.
  • Bridges – Pedestrian, highway, and railway bridges.
  • Industrial – Crane runways, transmission towers.
  • Event Spaces – Exhibition halls, concert stages.

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