Panel Thickness and Support Span Specifications

The document provides detailed data on nominal thicknesses of aluminum roofing panels and their allowable uniformly distributed loads based on different support span configurations.

Thickness and Support Span Tables

Two main static schemes are considered for aluminum sheet thicknesses (in mm):

• Two Supports (DUE Appoggi): Thicknesses from 0.60 mm to 1.00 mm are listed with allowable loads (Kg/m²) for support spans ranging from 100 cm to 275 cm. Load capacity decreases as span increases and thickness decreases.
• Three or More Supports (TRE O PIÙ Appoggi): Similar thickness range with higher allowable loads due to increased support points, covering spans from 100 cm to 275 cm.

Load Capacity and Safety

The allowable loads are given with a safety coefficient of 2.5 and a deformation limit defined as a deflection (f) equal to 1/200 of the span length (L). Conversion factor: 1 Kg/m² = 0.00981 KN/m².

Thermal Transmittance (U-Value) and Panel Weight

The thermal transmittance coefficient (U) is calculated considering the actual thickness of the insulating core, excluding the contribution of the corrugations, and accounting for surface resistances.

• Panel thicknesses are specified at 0.60 mm with bitumized felt paper (Cartonfeltro Bitumato) as insulation.
• Thermal transmittance values (U) are provided for panel weights ranging from 30 to 120 Kg/m², with U-values decreasing as weight increases, indicating better insulation.

Material and Construction Notes

The panels consist of aluminum sheets combined with bitumen-impregnated felt paper for insulation. The data tables are developed assuming aluminum ribbed support structures.

Summary of Critical Parameters

• Thickness range: 0.60 mm to 1.00 mm nominal thickness.
• Support spans: 100 cm to 275 cm.
• Load limits: Specified in Kg/m² with safety factor 2.5 and deflection limit f = 1/200 L.
• Thermal transmittance: U-values calculated based on core thickness without corrugation effect.
• Material: Aluminum sheets with bitumen felt insulation.

This information is essential for structural design and thermal performance evaluation of aluminum roofing panels under various loading and support conditions.