Tag Archives: roof

A picture is better than 1000 words…

Hello Friends ,

Good afternoon.

You all know the Chinese phrase ” A picture is better than a thousand words “

Let us understand some basic terms of the building with the help of the photographs.

There are certain photographs through which these terms can be understood.

BALCONY

PERGOLA

CRM

ROOF

CHAJJAH

FACADE

MUMPTY

So friends , now you tell me how do like this experience ?

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There are 500 plus terms which have been explained with the help of actual photographs taken at the site.

The terms are from various topics such as Concrete, RCC, Reinforcement , Masonry and Structure.

This collection is quite useful for understnading the basic concepts of construction.

You can have these photographs for a very very nominal cost. 

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Structural steel estimation 05

Exercise : 

In the following sketch , you can see the North light truss.

The dimensions have already been given .

The span is 7.5 M and the rise of the truss is 1.5m. The vertical members are known as Struts ( These carry compression force ) and the diagonal members are known as Ties ( These carry tensile force ).

The rafter on the top is made of two equal angles ( back to back ) of 65 x 65 x 6 @ 5.8 Kg/M and the Bottom rafters have been made with two equal angles ( back to back ) of 50 x 50 x 6 @ 4.5 Kg/M.

All the ties have been fabricated with ISA 50x50x6 @4.5 Kg/M and

the Struts have been made with ISA 65x65x6 @ 5.8 kg /M.

We need to find out the total weight of One North light truss.Picture10 First step is to give unique names to each of the nodal points.

A node point is a junction  where two or more members are connected. 

usually , there shall be a Gusset plate provided at this junction.

Second step is to find out the lengths of individual members.

The final solution works out as follows :

Picture11