Category: 1. Roof

They are used for roofs of workshops, factories and temporary sheds. GI sheets are available in different sizes. 22 gauge sheets are commonly used. An end lap of 15 cm and a side lap of two corrugations are provided while fixing the GI sheets at the top of the roof. It is light and easy…

An average of 10-13 cm thick LC terracing with some waterproofing compound is provided over the RCC slab to make the roof leak proof. The lime concrete is thoroughly beaten by several workers with wooden beaters for several days to make the roof more compact and impermeable. At the junction with the wall, the lime…

Brick or concrete arches are constructed with rolled steel joists, which are supported on the walls of the rooms. Some inert material fills the spandrels between the arches. Above this, a 10 cm thick average lime concrete (LC) roof is provided to make it waterproof. Some waterproofing materials can be used with lime concrete and…

After the bricks are completely set, a 10 cm thick layer of brick-built concrete is laid during bricklaying. It is beaten with wooden hand beaters up to 7.5 cm. The beating is continued until the beater fails to make an impression on the surface of the roof.Two layers of flat tiles (15 × 10 ×…

In high rainfall areas, flat roofs are not suitable.The initial cost is high.Due to high temperature variations, sometimes the roof surfaces develop cracks that are difficult to repair.The speed of construction is slower than that of a pitched roof.If proper slope is not provided on the roof to drain the rainwater.

A flat roof is easy to construct and maintain.It gives a better architectural look to the building.Making a flat roof fire resistant is easy.It has good insulating properties. This avoids the need for a false ceiling.In the case of a flat roof, the construction of the upper floors can be easily undertaken, while in the…

A roof that is almost smooth is called a flat roof. It is becoming more popular with the introduction of suitable construction materials. It can be constructed in reinforced cement concrete (RCC), rolled steel joists, brick, concrete or flagstone supported on tiled arches. The roof is provided with a slight slope in one direction for…

The use of steel trusses has become economical for spans of more than 12 m. Various standard shapes and sizes of rolled steel are available for the construction of steel trusses. This type of truss is designed in such a way that the members are either in compression or tension and bending stresses are not…

This truss is in the shape of a bow and is also called a bow string or lattice roof truss. It is made of thin sections of wood. This truss can be used for larger spans up to 30 meters provided a light roof covering is used. In this type of truss, the central riser…

It is a combination of King Post Truss and Queen Post Truss. The upper section is shaped like a king post truss and the lower section resembles a queen post truss. The truss has two pitches. The upper pitch varies from 30 to 40° and the lower pitch from 60 to 70°. This type of…