Concrete Roof Slab Thickness

Methods used for finding slab thickness varies for different types of slabs.

Concrete roof slab thickness.

For example we build residential in flat plate concrete which will typically have a column spacing of 20 oc and a slab thickness of 8 typ. Bottom bars 2 3 two sides. Commercial is typically steel w a composite deck so you ll have a 5 6 slab sitting on top of steel beams. A solid slab of concrete capping the top of your house.

Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. In many domestic and industrial buildings a thick concrete slab supported on foundations or directly on the subsoil is. In general 6 inch 150mm slab thickness is considered for residential and commercial buildings with reinforcement details as per design. Joints between adjacent precast concrete slabs need not be considered in calculating the slab thickness provided that a concrete topping not less than 1 inch 25 mm thick is used.

Concrete thickness for flatwork such as slabs on grade and driveways a minimum thickness of four inches is required but increasing the thickness to five inches can add nearly 50 percent to the load bearing capacity. Top bars two sides 2 3. A concrete roof is exactly what it sounds like. Exact specifications vary but most concrete roofs are several inches thick.

Conventional concrete slabs are square in shape and have a length of 4m. A concrete slab is a common structural element of modern buildings consisting of a flat horizontal surface made of cast concrete. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. Steel reinforced slabs typically between 100 and 500 mm thick are most often used to construct floors and ceilings while thinner mud slabs may be used for exterior paving see below.

Design process includes proper assumption of structural element sizes and then check the suggested dimensions to make sure that it meets the requirements of the design. Total no of bars 12 2 3 2 3 24nos. Thickness of concrete slab depends on loads and size of the slab. Reinforced concrete slabs are heavier and generate higher seismic forces in an event.

L 6 3 2covers 2hooks take cover 4cm hook 9xd. Minimum thickness of concrete structural elements based on aci 318 14 irc 2009 is 456 2000 and ubc 1997 is presented. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. The thickness of conventional slab is 4 or 10cm.

See more one way and two way slab design programme. 5 to 6 inches is recommended if the concrete will receive occasional heavy loads such as motor homes or garbage trucks. Minimum thickness of concrete slab beam column foundation and other structural members is selected to meet the design requirements as per standard codes.