MASTER'S LIBRARY

RCC Column A column is a very important component in a structure. It is like the legs on which a structure stands. It is designed to resist axial and lateral forces and transfer them safely to the footings in the ground. Columns support floors in a structure. Slabs and beams transfer the stresses to the columns. So, it is important to design strong columns. Basis of classification of columns and different types of reinforcement required for a certain type of column. A column may be classified based on different criteria such as: 1. Based on shape: Rectangle Square Circular Polygon 2. Based on slenderness ratio: The ratio of the effective length of a column to the least radius of gyration of its cross section is called the slenderness ratio. Short RCC column, =< 10 Long RCC column, > 10 Short Steel column, =<50 Intermediate Steel column >50 & <200 Long Steel column >200 3. Based on type of loading: Axially loaded column A co...

Usefull Civil Engineering Calculation CONCRETEGRADE: M5 = 1:4:8 M10= 1:3:6 M15= 1:2:4 M20= 1:1.5:3 M25= 1:1:2 Weight of Engineering Materials 1.Bitumen – 1340 Kg / M3 2.Cement – 1440 Kg / M3 3.Gold – 19224 Kg / M3 4.Ice – 913 Kg / M3 5.Wrought Iron – 7700 Kg / M3 6.Pig Iron – 7200 Kg / M3 7.Cast Iron – 7650 Kg / M3 8.Lead – 11374 Kg / M3 A.C Sheets – 17 kg / M2 10.Petrol – 690 Kg / M3 CLEAR COVER TO MAIN REINFORCEMENT: 1.FOOTINGS : 50 mm 2.RAFT FOUNDATION.TOP : 50 mm 3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm 4.STRAP BEAM : 50 mm 5.GRADE SLAB: 20 mm 6.COLUMN : 40 mm 7.SHEAR WALL : 25 mm 8.BEAMS : 25 mm 9.SLABS : 15 mm 10.FLAT SLAB: 20 mm 11.STAIRCASE : 15 mm 12.RET. WALL : 20/ 25 mm on earth 13.WATER RETAINING STRUCTURES : 20/30 mm WEIGHT OF ROD PER METER LENGTH: DIA WEIGHT PER METER 6mm = 0.222Kg 8mm = 0.395 Kg 10mm = 0.616 Kg 12mm = 0.888 Kg 16mm = 1.578 Kg 20mm = 2.466 Kg 25mm = 3.853 Kg 32mm = 6.313 Kg 40mm = 9.865 Kg 1bag cement-50kg 1feet-...