How to build a concrete ceiling

How thick is a concrete ceiling?

between 5-6”

How do you reinforce concrete ceilings?

  1. There are a couple methods, you can reinforce a slab with structural steel framing. …
  2. You can also reinforce with exterior carbon fiber reinforcing. …
  3. You can also add more concrete, though the detailing is difficult, and getting the new slab and existing to act compositely is a challenge.

How do I know if my ceiling is concrete?

If there’s no drywall, just knock on the wall. If the wall feels as hard as concrete, it probably is. If there is drywall, take a drill and a very small bit and drill a hole somewhere inconspicuous. If the bit stops going after an inch or two the wall is concrete.

Can a basement have a concrete ceiling?

concrete ceilings are common in basement rooms when that room is under an old entry way, stairs or what was originally designed as an outdoor space. Our typical basement cellar room has a concrete ceiling. It sits under the entry porch room that was most likely originally and open porch room.

Can I pour concrete 1 inch thick?

There aren’t many reasons to have only a 1-inch thick concrete surface. It is too thin to use as a flooring just by itself; however if you need to resurface damaged concrete, a 1-inch layer is a good amount.

What is the minimum thickness for concrete?

2 inches

How do you cover a concrete ceiling?

Either plaster or joint compound can be used for skim coating concrete ceilings. The wet plaster or drywall “mud” must be mixed so it is easy to spread ,but not so thin that it will drip from the ceiling.

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How much weight can a concrete ceiling hold?

Concrete is ~150 lbs per cubic foot, so every 2′ would weigh ~1800 lbs across the 25′ span. Since a reinfored CMU wall is rated to 3000 lbs per square foot, the walls should be quite sufficient to hold the concrete roof and a single story house above it.

How do you support a concrete roof?

The steel joists will provide a strong foundation for the flat concrete roofing. As the width of the concrete slab is 16 3/4 inches, place the steel joists at this distance. The bottom of the joists should rest on either a beam or a wall. This will give it the support it requires.

Is drywall the same as plasterboard?

Drywall (also known as plasterboard, wallboard, sheet rock, gypsum board, buster board, custard board, or gypsum panel) is a panel made of calcium sulfate dihydrate (gypsum), with or without additives, typically extruded between thick sheets of facer and backer paper, used in the construction of interior walls and …

How do I drill into concrete?

Start the drill at its lowest speed for better control. Drill forward with steady, light pressure; do not force the drill. Drill the guide hole to a depth of 1/8- to ¼-inch. Stop the drill, sweep or blow away the accumulated concrete dust and pull out the drill.

How far can you span concrete?

Reinforced concrete allows a wide range of structural options and provides cost-effective solutions for a multitude of situations—from residential buildings with moderate live loads and spans of about 25 ft, to commercial buildings with heavier live loads and spans ranging from 40 ft to 50 ft and beyond.

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