Advantages and Disadvantages simple Methods
Points of interest and Disadvantages of Folded Plate Roofs Over Shell Roofs:
Advantages are:
(a) Form work required is moderately more straightforward.
(b) Movable structure work can be utilized.
(c) Design includes less difficult figurines.
Disadvantages are:
(a) Folded plate expend more material than shells.
(b) Form work can be evacuated following 7 days while in the event of shells it tends to be minimal prior.
Rooftop Coverings for Pitched Roofs Different kinds of covering materials are accessible for pitched rooftops and their determination relies on the climatic conditions, manufacture office, accessibility of materials and moderateness of the proprietor. Regularly utilized pitched rooftop covering materials are:
(a) Thatch
(b) Shingle
(c) Tiles
(d) Slates
(e) Asbestos bond (A.C.) sheets ( f ) Galvanized iron (G.I.) sheets
(a) Thatch Covering:
These covers are accommodated little ranges, basically for private structures in towns. Cover is a rooftop covering of straw, reeds or comparative materials. The cover is very much absorbed water or flame opposing arrangement and pressed packs are laid with their butt closes pointing towards eves. Thickness fluctuates from 150 mm to 300 mm.
The supporting structure comprises of round bamboo rafters divided at 200 mm to 300 mm over which split bamboos laid at right edges at close dividing. It is asserted that reed cover can last 50 to 60 years while straw cover may last for 20– 25 years.
The benefit of cover rooftop is they are shabby and don’t require talented specialists to manufacture them. The weaknesses are they are poor heat proof and harbor rodents and different bugs.
(b) Shingles:
Wood shingles are only the part or swan meager bits of wood. Their size changes from 300 mm to 400 mm and length from 60 mm to 250 mm. Their thickness changes from 10 mm toward one side to 3 mm at the opposite end.
They are nailed to supporting structures. They are normally utilized in sloping zones for ease lodging. They have poor flame and termite obstruction.
(c) Tiles:
Various mud tiles are made in various territories. They fill in as great covering materials. Tiles are upheld over secures which are thus bolstered by rafters/brackets and so on. Allahabad tiles, Mangalore tiles are fantastic between locking tiles. They give great appearance too.
(d) Slates:
A slate is a sedimentary shake. Its shading is dim. It very well may be effectively part into slender sheets. Slates of size 450 mm to 600 mm wide, 300 mm long and 4 to 8 mm thick are utilized as covering materials of contributed rooftops the zones where slate quarries are close-by. A decent slate is hard, intense, strong. They are having harsh surface and they give ringing ringer like sound whenever struck. They don’t ingest water.
(e) A.C. Sheets:
Asbestos concrete is a material which comprises of 15 percent of asbestos strands equally conveyed and squeezed with concrete. They are produced in adequately extensive size.
The width of an A.C. sheet shifts from 1.0 to 1.2 m and length from 1.75 to 3.0 m. To get adequate quality with slight segments they are produced with crease or with traffords. They are settled to the steel purling utilizing J-jolts. The material is very practical, waterproof. Anyway not extremely great warm safe.
They are regularly utilized as covering materials in product houses, godowns or for bigger corridors. In theater and so forth., if these sheets are utilized, false roofs are given to get great warm opposition.
(f ) G.I. Sheets:
Galvanized iron ridged sheets are made in the sizes 1.0 to 1.2 m wide and 1.65 m length. Galvanization of iron makes them rust evidence. They are settled to steel purling utilizing J-jolts and washers. They are solid, flame resistant, light in weight and need no support. They are regularly utilized as covering materials for product houses, godown, sheds and so forth. Table 8.6 gives correlation among GI and AC sheets for rooftop covering.
