Reinforced Concrete Roof Slab Installation

According to the 1995 aci code all two way reinforced concrete slab systems including edge supported slabs flat slabs and flat plates are to be analyzed and designed according to one unified method such as direct design method and equivalent frame method.

Reinforced concrete roof slab installation.

The slab may be supported by walls or by reinforced concrete beams usually cast monolithically with the slab or by structural steel beams or by columns or by the ground. If it is six feet tall then the rebar has be six feet tall plus the depth of the excavated hole and an extra foot to account for setting the rebar in the ground. For an exposed concrete roof installation it is recommended that a competent concrete mix design consultant or concrete supplier be engaged to assist in the development of the concrete mix to be used. The construction of the original building consisted of a reinforced concrete frame with cast in situ trough floors.

The rebar should be in the concrete throughout the entire area of concrete. Sufficiently waterproof concrete can be achieved and is regularly used for water tanks ships pipe and more. One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need. Slabs are constructed to provide flat surfaces usually horizontal in building floors roofs bridges and other types of structures.

Waffle slab grid slab it is a type of reinforced concrete slab that contains square grids with deep sides. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. Exact specifications vary but most concrete roofs are several inches thick. An extra floor was required to be constructed which involved converting the original roof slab to a floor slab thereby increasing the live load capacity to 3 kn m 2.

If you are reinforcing a column then the rebar needs to be the height of the column. To install such a roof a crew first builds a framework for the intended roof. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab. For determining moments shears and reactions of such slabs.

The design of the upper storey extension was a lightweight strut frame structure and after calculations were undertaken it was shown that the slab could not sustain the additional live load. The steel joists will provide a strong foundation for the flat concrete roofing. Step 3 placing the steel joists. Slabs are classified into 16 types.