Long span components calculator

Select structural systems for large spans

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The Long Span Components Calculator helps structural engineers select appropriate structural systems for large-span applications. Compare joists, trusses, beams, space frames, and other systems based on span requirements, geometry, and material preferences.

Long-span structures require specialized systems to efficiently span large distances without intermediate supports. System selection depends on span length, geometry (flat, pitched, curved), loading, and architectural requirements.

Filter structural systems by span range, material (steel, wood, concrete), geometry type, and span-to-depth ratios. The calculator helps identify appropriate structural solutions for auditoriums, gymnasiums, warehouses, and other long-span applications.

Features

Everything you need

Multiple structural system types
Span range filtering
Material comparison (steel, wood, concrete)
Geometry type support
Span-to-depth ratio guidance
One-way and two-way systems
Application recommendations

How it works

Simple workflow

1
Enter required span length
2
Select geometry type (flat, pitched, curved)
3
Filter by material preference
4
Review matching structural systems
5
Compare span-to-depth ratios

Use cases

Built for real-world scenarios

Structural system selection

Identify appropriate structural systems for large-span building applications.

Preliminary design

Compare structural options during early design phases before detailed analysis.

System comparison

Evaluate different structural systems for cost, depth, and constructability.

Architectural coordination

Select structural systems that meet architectural requirements for space and geometry.

FAQ

Frequently asked questions

Long spans typically exceed 50-60 feet, requiring specialized structural systems. Common long-span applications: auditoriums (80-150 ft), gymnasiums (80-120 ft), warehouses (100-300 ft), aircraft hangars (200+ ft).

Span-to-depth ratio = Span ÷ Depth. Typical: Joists 24:1, Trusses 20-22:1, Beams 15-20:1, Space frames 15-20:1. Lower ratios mean deeper members but may be more efficient.

One-way systems span in one direction (joists, trusses). Two-way systems span in both directions (space frames, two-way trusses). Two-way systems are more efficient for square or near-square spans.

Steel: Longest spans, highest strength. Wood: Moderate spans, lower cost, sustainable. Concrete: Good for fire resistance, but heavier. Consider span, loading, fire requirements, and cost.

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