03 3543 bonded abrasive polished concrete floors.
Concrete slab specifications for floors.
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.
Ff and fl numbers floor flatness and levelness.
The 4 inch pour of a standard slab is recommended for both garage floors and interior floors.
Bre digest 522 parts 1 2 hardcore for supporting ground floors of buildings.
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.
F numbers were developed in the 1980s to provide a systematic quantitative way to indicate the flatness and levelness of a concrete floor.
4 slab of 3500 psi concrete.
To achieve this strength the water cement ratio should be kept at 0 5 or less typically about a 5 inch slump concrete.
Floor levelness f l floor flatness f f classifying concrete floors based on flatness and.
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.
Traditionally concrete floors were specified to have a deviation of less than 1 8 over.
Its more than just forms and pouring concrete.
Standard concrete floor slab thickness in residential construction is 4 inches.
Aci goes further and recommends 4500 psi concrete for garages floor slab.
Design community architects owners gcs concrete slab contractors.
Industrial floor designresidential concrete slabs often have few design requirements to get between the contractor and completion of the job.
Five to six inches is recommended if the concrete will receive occasional heavy loads such as motor homes or garbage trucks.
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 irc requires that slabs be built with concrete with compressive strengths from 2500 to 3500 psi depending on the climate.
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.
Ground bearing concrete floor slabs should be at least 100mm thick including monolithic screed where appropriate.
Floor flatness levelnessone of the things that distinguishes a high tolerance floor is its f number requirement.
The higher the f number the flatter or more level the floor.
History of concrete floor flatness and floor levelness.
