Civil Site Engineer Must Know
#1 ONE WAY SLAB:
One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction.The ratio of longer span (l) to shorter span (b) is equal or greater than 2, considered as One way slab because this slab will bend in one direction i.e in the direction along its shorter span
#2 TWO WAY SLAB:
Two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along both directions, it is known as two way slab. In two way slab, the ratio of longer span (l) to shorter span (b) is less than 2.
#3 Minimum thickness of slab should be 125mm
#4 Compressive strength of bricks is 3.5 N/mm²
#5 Maximum concrete free fall allowed is 1.5 meter.
#6 Earth work excavation for basement above 3 m should be stepped form.
#7 Electrical conduits shall not run in column .
#8 Dimension tolerance for cubes -+2 mm.
#9 Lapping is not allowed for the bars having diameter more than 36 mm.
#10 Minimum bars for square column is 4 nos and 6 nos for circular column.
# 11 P H value of water should not be less than 6.
#12 for concrete grade M20 and above approved admixture shall be used as per mix design requirement
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#1 ONE WAY SLAB:
One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction.The ratio of longer span (l) to shorter span (b) is equal or greater than 2, considered as One way slab because this slab will bend in one direction i.e in the direction along its shorter span
#2 TWO WAY SLAB:
Two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along both directions, it is known as two way slab. In two way slab, the ratio of longer span (l) to shorter span (b) is less than 2.
#3 Minimum thickness of slab should be 125mm
#4 Compressive strength of bricks is 3.5 N/mm²
#5 Maximum concrete free fall allowed is 1.5 meter.
#6 Earth work excavation for basement above 3 m should be stepped form.
#7 Electrical conduits shall not run in column .
#8 Dimension tolerance for cubes -+2 mm.
#9 Lapping is not allowed for the bars having diameter more than 36 mm.
#10 Minimum bars for square column is 4 nos and 6 nos for circular column.
# 11 P H value of water should not be less than 6.
#12 for concrete grade M20 and above approved admixture shall be used as per mix design requirement
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