Introduction

Définition

A roof should help in protecting the building against external conditions in order to provide comfort and safety for the building occupants.

When a beam spans between two simple supports and carriers a uniformly distributed load (such as a roof covering) it tends to bend in the centre.

Long span roof construction:

Categories of buildings

Fondamental

Can a simple span roof support be used for distance in excess of ex. 15m ?

In essence, we want to:

  • Increase a beam's resistance to bending

  • Whilst minimizing the self weight of structural member

  • Maximizing its efficiency both economically and structurally