Concrete jacketing necessity: We often notice the fall of the plaster layer from the bottom of the ceiling or the sides of the bridges, and the rebar is exposed, and rust has spread widely. With a thickness of no less than 2.5 centimeters for ceiling concrete jacketing and to adjust the concrete jacketing thickness, we put pieces of spacers (biscuits) between the timber and iron to ensure that the provision of sufficient thickness for the concrete jacketing.
First: the lower concrete jacketing for the roof
Error: It is wrong to place the lower iron for bridges, nerves, ordinary slabs, or flat slabs on the timber directly at the bottom of the building.
Correct: It is better to raise the iron from the timber by at least 2.5 centimeters.
Second: The thickness of the concrete jacketing for tanks and orchards
Error: It is considered a mistake in the ceilings of wells, ground tanks, and concrete water tanks on the roofs that the thickness of the concrete jacketing is 2.5 centimeters.
Correct: The engineer must expose the ceilings to moisture and water vapors so that the concrete jacketing thickness should be between (5-7.5) centimeters.
Third: The priority of the ceiling or the wall
Mistake: It is wrong to build walls before pouring roofs.
Correct: It is better to pour the ceilings first, then build the walls later.
Fourth: the lower concrete jacketing between the block and the bridge iron
Error: It is wrong to put iron directly on the block wall.
Correct: Engineers must build after the ceiling pouring, but if we are under a de facto situation and the block walls have already been built, we put a 2.5 cm thick cookie under the canopy above the block.
Fifthly: the concrete side jacketing
Error: It is wrong for the wooden mold to touch the bridges from the sides.
Correct: The distance of the wood from the canes (biscuits – concrete jacketing) should not be less than 2.5 centimeters.
Sixth: Install the plastic biscuits
Error: It is preferable not to install the round plastic biscuit on the cane iron (in the sides).
Correct: It is more appropriate to install the plastic round biscuits on the main (horizontal) reinforcing bars, and with the addition of 1 centimeter to the diameter of the biscuit used (representing the diameter of the bowl), then we place biscuits with a radius of 3.5 centimeters instead of 2.5 centimeters.
Seventh: The direction of the plastic biscuit slots
Error: It is wrong to direct the slot of the plastic biscuit outward.
Correct: The biscuits should be directed (towards the center of the bridge) so that they do not slide when the wood is pressing on them.
In this article, we presented you with Concrete jacketing necessity for ceilings and what are the consequences that will happen if we do not care about how to implement the concrete jacketing, we learned about the errors that occur in how to put the biscuits, and how we correct them, in case you have any comment or inquiry about what you have read For this article, leave it in the comments below.
Source: wikipedia.org/wiki/Reinforced_concrete
Read More: buildineg.com/public/blog/what-is-a-concrete-jacketing-of-column/
