Rafter Thrust Calculator

Rafter Thrust Calculator Dekho

Calculate the horizontal thrust exerted by roof rafters using our Rafter Thrust Calculator. Enter the roof pitch, span, and load to obtain accurate structural analysis for safer roof design.

🏠 Rafter Thrust Calculator

Calculate horizontal thrust forces in roof rafters for structural design. Analyze ridge beam loads, tie rod requirements, and lateral forces based on roof pitch, spans, and loading conditions.

Rafter Thrust Results

Project ID/Description
Residential Roof Design
Horizontal Thrust
7794.23 N
Safe Thrust
11691.34 N
Tie Force
7794.23 N

Rafter Thrust Design Guide

Roof Type Typical Thrust (kN) Typical Pitch (degrees)
Residential Low-Pitch 5 – 20 10 – 25
Residential Standard 20 – 50 25 – 40
Commercial Steep 50 – 100 40 – 50
Industrial Heavy 100 – 200 20 – 40
📌 Note: Results are based on simplified structural analysis. Horizontal thrust = (Total Load × Span) / (2 × tan(pitch angle)). Tie force equals horizontal thrust to prevent rafter spreading. Safe thrust includes safety factor for design loads. Actual structural design must consider rafter size, material properties, connection details, wind loads, seismic loads, and comply with local building codes (IBC, Eurocode, etc.). Always consult a licensed structural engineer for final design verification.

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