Author: haroonkhan

A roof covering is a material which is placed over a sloping roof to give protective surface. The primary function of the covering is to prevent the direct entry of heat, rain and snow into the building. Choice of roofing material depends on the type of roof structure, local conditions, cost, the type of building,…

Shape and positioning of members in a steel roof truss are designed in such a way that the members are subjected to either compression or tension. Trusses do not have any bending stress in them. The compression members of the truss are based on the span, slope, the covering material, and centre to centre of…

Different types of timber sloping roofs are discussed below. 1. Lean to Roof This is a roof which is usually used to cover verandah. This is used for spans up to 2.5 m. The roof covering is fixed to battens running across the rafters. It is usually constructed as a mono-pitched roof (Fig. 25.2). Figure…

Following are the terminologies which are relevant to sloping roofs (Fig. 25.1). Figure 25.1 Parts of a sloping roof 1. Span Clear span is the horizontal distance between the walls or the supports. Effective span is the horizontal distance between the centres of bearings of the supports. 2. Pitch Pitch is the slope of a roof…

Sloping roofs are comparatively light in weight and can be used in large to very large spans. They are quite suitable in areas where there are heavy rain and snow. Shapes of sloping roofs are dependent on the area to be covered, material used, light, ventilation needed, etc.

Roofs may be grouped under two major categories, viz., sloping or pitched roofs and flat roofs. Slope or pitched roofs are those which have the surfaces with considerable slope for covering the building structure. The modern construction like shells may also be grouped under this category. A roof which is nearly flat is known as…

A roof is provided to satisfy the following basic requirements:

Roof is the upper most part of a building which is constructed on structural members and provided with a covering material. The sole aim of roof is to enclose the space securely and protect the building and the occupants from atmospheric effects like sun, wind, rain, snow, etc. A roof is as important as that…