Static structures (e.g. – buildings) – Coplanar sustainers; e.g. – joist to wall
Patent
1998-10-29
2000-11-21
Chilcot, Richard
Static structures (e.g., buildings)
Coplanar sustainers; e.g., joist to wall
52639, 52702, E04B 100
Patent
active
061485748
DESCRIPTION:
BRIEF SUMMARY
The invention concerns improvements in and relating to roofing for buildings, and, more especially, to an improved connecting means for use in the assembly of a building roof from prefabricated components of metal, e.g. steel.
In the construction of prefabricated metal buildings for example for storage and warehousing purposes, a storage area may be provided with a supported roof that does not rely upon external walls of the building for its support. Thus the sides of the building may be left open for access, or may be closed by means of simple, non load-bearing walls. In such a construction, for example, vertical I-beams of rolled steel may serve as columns for supporting the roof via trusses bolted to the flanges of the I-beams at the upper ends thereof. Purlins carried by the roof trusses will then support the roof cladding.
Such an arrangement is particularly useful for storage purposes, since the vertical I-beams may also serve as supports for cantilever racking of known construction.
However, the assembly of such a building construction is complicated by the requirement for the roof trusses to be bolted to the upper ends of the vertical I-beams. The relatively massive trusses must be manoeuvred into position with their ends abutting the flanges of the I-beams in the appropriate position for the assembly of connecting bolts. The trusses must be lifted by a hoist and accurate manual location of the ends of the trusses swung from a hoist can prove difficult, particularly in adverse weather conditions.
It is accordingly an object of the invention to provide means enabling simplification of the process of assembly of such a construction.
In accordance with the invention there is provided a roofing truss for assembly to the upper end of a vertical I-beam, the truss comprising an end face for abutment against a flange of the I-beam and further having, extending obliquely downwardly and outwardly from the upper edge of said end face, a bifurcated guide means arranged to extend over the upper portions of a flange of such an I-beam and to engage on either side of the central web of the I-beam.
Such an arrangement provides, in a simple manner, for both vertical and horizontal alignment of the end of a roofing truss during its attachment to the I-beam.
In accordance with a preferred feature of the invention there may also be provided clamping means for engagement around the flange of an I-beam and an end plate of the roofing truss, for clamping the latter securely against the I-beam, in use. Thus the requirement for the insertion of securing bolts through apertures in the flange of the I-beam and the end plate of the roofing truss may be avoided, further simplifying assembly of the roof.
Advantageously, the central web of the I-beam may be provided with angled counter pressure plates for face to face engagement with the bifurcated guide means of the roofing truss.
If desired additional security in the finished assembly may be obtained by securing bolts extending through the bifurcated guide means and the counter pressure plates of the I-beam.
The invention is illustrated by way of example in the accompanying drawings, in which;
FIG. 1 is a diagrammatic elevation of part of a building construction of a kind to which the present invention may be applied,
FIG. 2 is an enlarged detail of a part of a roofing construction of the kind shown in FIG. 1,
FIG. 3 is a plan view corresponding to FIG. 2,
FIG. 4 is a sectional plan view taken on the line IV--IV of 2, and
FIG. 5 is a view similar to FIG. 2 showing an alternative arrangement.
Referring to FIG. 1 there is shown an example of a building construction for use in warehousing and storage.
The building comprises a plurality of vertical I-beams 1 that are supported from the floor 2 of the building and anchored to the foundations in known manner. The upper ends of the I-beams support transversely extending roofing trusses 3 fabricated from welded steel frames in known manner. Trusses 3 spanning the central area of the building may be interconnected by tension braces 4, a
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Chilcot Richard
KHS Group Limited
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