Installation of Rainwater Gutters Essay

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4. INSTALLATION OF RAINWATER GUTTERS 4.1 Rainwater Gutters A rain gutter is used for collecting rainwater from the roof. The collected rainwater flows through an outlet drain that is connected by a pipe to the rainwater container (jar/tank). The rain gutter can be made from various materials depending on local availability, such as: ● Galvanized iron sheet ● Bamboo ● Wood (join 2-3 pieces of wood together and fill the joints with tar or cover the joints with plastic sheet) a. Galvanized iron gutter Commercially available galvanized iron gutter is made in different shapes such as semi-circular, trapezoid, etc. b. Bamboo gutter Bamboo gutter is commonly used where bamboo is available. It is easy to make and install. c. Wooden gutter A wooden gutter is made by joining pieces of wood (2.5 centimetres thick by 6 centimetres wide, or 1.2 centimetres thick by 15 centimetres wide) into a “V” shape. Fill the joints with a mixture of tar and lime or with resin. Sometimes, plastic sheet is used to cover the joints. There is no need to fill them. 4.2 The Gutter Holder The function of a gutter holder is to secure the gutter to the roof structure at certain intervals. A gutter holder can be made using iron sheet, wood and tree twigs. 4.3 Sizes of Rain Gutter and Outlet Drain The roof area and slope determine the size of rain gutter. The diameter of the outlet drain is proportional to the roof area and the width of the gutter. An appropriate gutter width and outlet drain diameter corresponding to the roof areas are shown in Table 4-1. Table 4-1: Appropriate Width of Gutter and Diameter of Outlet Drain and Various Roof Areas ROOF AREA, sq. m 50 60 70 80 90 100 GUTTER WIDTH, cm 12 13 14 15 16 17 OUTLET DRAIN dia., cm 6.5 6.5 6.5 7.5 7.5 7.5 29 a. Depth of gutter The depth of the gutter is one-half of the gutter width. For example, if the gutter is 14

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