Here are some of the usefull tips for Civil Engineers.
- Lapping of bars : Only when diameter of bar is less than 36 mm.
- Circular column : Use minimum of 6 longitudinal bars.
- Thickness of slab : Minimum is 0.125 m
- pH value of water : More than 6 should be used for building purposes.
- Compressive strength of bricks : 3.5 N/mm
- Dead load of structure is its self weight.
- Sand that have more than 5% moisture shall not be used for concrete mix.
- Thickness of DPC should not be less than 2.5 cm.
- RMC (Ready Mix Concrete)
- It is made at factory and transported to the site.
- It is used where there is a lack of space for mixing the concrete.
- It is used where a huge amount of concrete is required for construction.
- Height of floor : 3 meter or 10 feet
- Cantilever beam : One end is fixed support and the other end is free.
- Simply supported beam : It has minimum of two supports.
- PCC : It is used on members when the tensile forces are not acting on it.
- Weight of first class clay brick and crushing strength : 3.85 Kg and 10.5 MN/square meter.
- Impermeability of concrete : It is the concrete that resists the entry of water or moisture into it.
- Curing period of RCC : 28 days.
- Minimum sill level height : 44 inches
- Ties : Transverse reinforcement providing in columns.
- Stirrups : Transverse reinforcement providing in beams.
- The thermal expansion co-efficient of concrete and steel : 12×10-6/Deg.C
- Number of bricks necessary for 1 cubic meter of brick masonary : 550
- Specific gravity of cement : 3.16 g/cubic cm
- Specific gravity of brick : 2 g/cubic cm
- Specific gravity of sand : 2 g/cubic cm
- Standard size of brick : 19cm x 9 cm x 9cm
- Slope or pitch of the stair : 25 degrees to 40 degrees
- Rise in stairs : 150 mm or 200 mm
- Tread in staircase : 250 mm or 300 mm
- Hook length : more than 9 x diamter of bar
- Unit weight of PCC : 24 KN/cubic meters
- Unit weight of RCC : 25 KN/cubic meters
- Unit weight of Steel : 7850 Kg/cubic meters
- Volume of 50 Kg cement bag ” 1.3 cubic feet.
- TMT Bars : Thermo mechanically treated bars
- Length of each bar from factory : 12 meters.