The structure of the aircraft hall consists mainly of four longitudinal lattice girders connected by cross beams.

These glazed elements will rest, on one side, on the historical lattice girders of the Eiffel tower, named "beams of 30m".

These glazed elements will rest, on one side, on the historical lattice girders of the Eiffel tower, named "beams of 30m".

1 Trusses are placed in the first and last chapel.

The system is designed to enclose such equipment, be lightweight, and facilitate easy set-up and take-down of truss assemblies.

12-metre tall lattice or open-frame girders make it possible to span the 58 m without intermediate supports.

The structure of the suspended level exists of 10 main trusses which are supported by the concrete walls of the towers.

In general the roof comprises a succession of ramps and glass walls supported by 52 oblique beams resting on lattice girders over a variable height tangent to its surface.

These steel truss girders on load-bearing cables form the core of a roof structure clad on both sides.

The lightweight truss system includes an open-sided structure with rigid ends, and a strut channel system that facilitates the installation of lights, audio equipment, and other stage-related devices.

When lightning strikes occur elsewhere than on the lightning conductors of the summit, they can also reach the top antenna or lattice girders of the structure.

At least one side truss (24) extends between the end trusses (22).

Further the present invention relates also to a method for fabrication of such truss girder (10).

A grid reinforcement (31, 32) is suspended on the upper edge portion of the beams (1).

An integral truss system (20) for a roof (31) includes a pair of opposing end trusses (22) that can span between opposing (e.g. outer) walls of a building.