Civil and Construction Engineering knowledge

A beam of equal thickness to a slab is called a console beam. Another name for a concealed beam is the hidden beam. Simply put, the idea of ​​this concealed beam came from the idea of ​​giving additional reinforcement by thinking of a strip along the columns in a flat slab.

1) The beauty increases as there is no unwanted beam depth.

2) The cost of saturating can be reduced.

1) This type of beam should not be used on any roof with a thickness below 200 mm.

2) If you want to make a concave beam, you have to analyze not only the beam, but also the model with the whole slab.

In fact, there is no such thing as a concealed/hidden beam in engineering. The concept of concealed/hidden beam has been established by imitating the way in which extra reinforcement is given along the strip along the column to column in the flat slab. 200 mm Or a roof with a thickness of less than 7.75 inches is not right to do this thing. It should be avoided as much as possible.

There are then few items that civil site engineers can note to promote construction work while preserving building efficiency.

• Bars with diameters greater than 36 mm are not permitted to be lapped.
• The average distance between the chair is 1.00 m (or) 1 No per 1 m2.
• A minimum diameter of 12 mm should be used for dowels.
• Minimum chairs to use with a diameter of 12 mm bar.
• No less than 0,8% and no more than 6% of total C / S reinforcement.
• The square column minimum bar is 4 nos and the circular column is 6 nos.
• Minimum bar in slab shouldn’t be less than 10 mm ( 8 mm for HYSD).
• The slab is at least 125 mm thick.
• Tolerance size + 2 mm for cubes.
• A maximum of 1.50 m are required for free fall of concrete.
• With bars dia than 36 mm, lap slices must not be used.
• The absorption of water from bricks does not reach 15%.
• The water does not have a pH value below 6.
• Bricks’ compressive force is 3.5 N /mm2
• The appropriate binding wire is 8 kg per MT in steel reinforcement.
• 3 samples should be collected for the core cutting test per 100 m2 during soil filling.

Curing time of different types of cements for R.C.C members: