Concrete Slab Specifications For Floors

The higher the f number the flatter or more level the floor.

Concrete slab specifications for floors.

4 slab of 3500 psi concrete. Polished concrete appearance chart. Ff and fl numbers floor flatness and levelness. For both interior floors and garage floors the minimum strength recommendation is 2 500 psi however similarly to slab projects an ideal standard is 4 500 psi especially for garage floors which must sustain much more wear and tear and heavy machinery.

03 3543 bonded abrasive polished concrete floors. Traditionally concrete floors were specified to have a deviation of less than 1 8 over. History of concrete floor flatness and floor levelness. Floor levelness f l floor flatness f f classifying concrete floors based on flatness and.

Floor flatness levelnessone of the things that distinguishes a high tolerance floor is its f number requirement. The irc requires that slabs be built with concrete with compressive strengths from 2500 to 3500 psi depending on the climate. Industrial floor designresidential concrete slabs often have few design requirements to get between the contractor and completion of the job. Placed over a 3 4 base of stone stonedust sand whichever is local standard medium broom finish for slabs over 25 x 25 slightly rougher medium broom finish for smaller slabs to minimize tile migration.

Standard concrete floor slab thickness in residential construction is 4 inches. Ground bearing floors shall be of adequate strength and durability and use concrete mixed and reinforced as necessary to support floor loads safely and resist chemical and frost action. Five to six inches is recommended if the concrete will receive occasional heavy loads such as motor homes or garbage trucks. Design community architects owners gcs concrete slab contractors.

The slab has to be at least 3 5 thick and possibly thicker for expansive or other difficult soils. The international residential code irc lays out a series of requirements for pouring a concrete slab on grade. Bre digest 522 parts 1 2 hardcore for supporting ground floors of buildings. Its more than just forms and pouring concrete.

To achieve this strength the water cement ratio should be kept at 0 5 or less typically about a 5 inch slump concrete. Polished concrete aggregate exposure chart. If the contractor knows what he or she is doing and knows what the customer wants then the lack of specifications is probably a good thing. The 4 inch pour of a standard slab is recommended for both garage floors and interior floors.

Most residential projects only specify minimum concrete compressive strength. To prepare the base cut the ground level to the proper depth to allow for the slab thickness. To have specification for industry standard without manufacturer bias and produced in a timely manner.