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Concrete control joints should be no less than ¼ of the total thickness of the slab (1” deep for a 4” thick pour) and placed no less than 2-3 times (in feet) the thickness (in inches) of the slab (8-12 feet apart for a 4” thick pour).

Contraction joints are chiefly defined by their spacing and their method of load transfer. As per I.R.C, the maximum spacing of these joints is 4.5 m in plain cement concrete slabs.

When spacing out joint cuts, the general rule of thumb is that each joint should be around 2-3 times the thickness of the slab, but in feet. So, for example, for a 4-inch slab, joints should be about 8 to 12 feet apart.

Epoxy. Epoxy is often used to manufacture expansion joints because of its durability and high strength, which means it can resist excess force and stress. Other benefits include its low viscosity, which makes it easy to use, and stable performance in various temperatures.

As a standard, expansion joints of type UFS are manufactured in nominal diameters from DN 40 to 1000 and in pressure ranges of PN 6, 10, 16 and 25. As a standard, flanges are made of carbon steel and are primer coated.

Detailed Solution. It is clear from above table that for rough interface the maximum spacing for expansion joint is 140 m. Dedicated Freight Corridor Corporation of India (DFCCIL) will soon release the official notification for the DFCCIL Junior Manager Recruitment 2023.

The spacing between expansion joint for a maximum rise in temperature of 25∘C is (assuming coefficient of thermal expansion of concrete as 10×10−6per ∘C)