supply of plantation fencing material and forestry work in west division area-1.01 barbed wire-galvanized steel barbed vire type b the barbs shall have four points and shall be formed by twisting two point wires each two turns, tightly around one line wire making all together four complete turns line wire 2.5 mm, point wire 2.5 mm distance between two barbs 75 mm, conforming to is -278-2009 certificate compulsory 1.02 rcc fencing poles height 2.0m- type-straight length - 2.00 m dimensions - bottom 10x10 cm square, top 8x8 cm square cement concrete mix cement, sand and metal ratio 1:2:4, with 12.5 nominal size coarse aggregate. sand used should be free from clay and salt, concrete mix shall be conforming to grade m- 15 of is:456:2000 certificate compulsory reinforcement - 4 round vertical bars of 6 mm diameter. 11 no of stirrups of 6 mm diameter round ms bars 20 cm centre to centre. hooks-5 no, bottom hook should be provided 60 cm above the bottom of the pole, second at 82.5 cm, third hook at 112.5 cm, fourth hook at 150 cm, top and fifth hook at 195 cm from bottom. manufacturing - in order to ensure desired compressive strength, rcc fencing poles should be compacted with the help of platform vibrators. surface should be uniform and free from voids. the concrete cover over the reinforcement should not be less than 1.5 cm. 1.03 galvanised steel chainlink fence- mesh wire - galvanised steel wire of 3.15 mm diameter fabric size 100x100 mm height-150 cm line wire -2 numbers of line wires of 4.00 mm diameter standard- conforming to is 2721-2003, with up to date amendments. certificate compulsory