Tubular Steel Monitor Roof truss | Large Span Constructions

May 3, 2010 by Designer

Steel Trusses

The trusses are structural members and comprise of one or more triangular units constructed with straight members whose ends are connected at joints referred to as nodes. The triangular members arranged in series and supported on the walls.

Major use of steel trusses is being done in the construction of large span structures such as industries, factories, Auditoriums, Cinema Theatres, Shopping Malls, Concert Halls etc.

But the use of steel trusses is not limited to various types only. Major use of trusses is also seen in the construction of bridges.

Roof coverings used over Steel trusses

RCC roof can be used over the trussed construction but usually to keep the roof lightweight, asbestos sheets are used as roof covering.

Plastics sheets are also used as roof covering.

Tubular Steel Roof Truss | Trussed large span Constructions

January 20, 2010 by Designer

Tubular Steel roof trusses are used for large span constructions such as factories, industry worksheds, shopping malls, huge exhibition centres, multiplexes etc. They are generally used for spans as large as 25-30m.

There is a similar kind of a truss called “Tubular Steel Monitor Roof Truss“. There are projections on the roofs called “Monitors” to admit daylight into the space.

Tubular Steel Roof Truss

It is in two halves with bolted joints at P and Q, the remaining joints being 5mm fillet welds made in the workshop.
The main tie member rises 130mm from L to N to counteract any appearance of sag that would be evident if it were horizontal.
A bend a N reduces the midspan height to 2m so that the half truss is a manageable size for transportation.