Concrete Slab Specifications For Floors

Aci goes further and recommends 4500 psi concrete for garages floor slab.

Concrete slab specifications for floors.

To have specification for industry standard without manufacturer bias and produced in a timely manner. The higher the f number the flatter or more level the floor. 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. Floor flatness levelnessone of the things that distinguishes a high tolerance floor is its f number requirement.

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. Most residential projects only specify minimum concrete compressive strength. The international residential code irc lays out a series of requirements for pouring a concrete slab on grade. The slab has to be at least 3 5 thick and possibly thicker for expansive or other difficult soils.

Bre digest 522 parts 1 2 hardcore for supporting ground floors of buildings. Industrial floor designresidential concrete slabs often have few design requirements to get between the contractor and completion of the job. Its more than just forms and pouring concrete. Floor levelness f l floor flatness f f classifying concrete floors based on flatness and.

Ff and fl numbers floor flatness and levelness. History of concrete floor flatness and floor levelness. Polished concrete aggregate exposure chart. Standard concrete floor slab thickness in residential construction is 4 inches.

F numbers were developed in the 1980s to provide a systematic quantitative way to indicate the flatness and levelness of a concrete floor. 03 3543 bonded abrasive polished concrete floors. The 4 inch pour of a standard slab is recommended for both garage floors and interior floors. The irc requires that slabs be built with concrete with compressive strengths from 2500 to 3500 psi depending on the climate.

Traditionally concrete floors were specified to have a deviation of less than 1 8 over. To achieve this strength the water cement ratio should be kept at 0 5 or less typically about a 5 inch slump concrete. Ground bearing concrete floor slabs should be at least 100mm thick including monolithic screed where appropriate. To prepare the base cut the ground level to the proper depth to allow for the slab thickness.

Design community architects owners gcs concrete slab contractors. Polished concrete appearance chart. 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.