Concrete Floor Level Tolerances

Floor flatness levelnessone of the things that distinguishes a high tolerance floor is its f number requirement.

Concrete floor level tolerances.

The actual variation may be smaller as the. It is intended to be used with aci 117 for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein. The higher the f number the flatter or more level the floor. This could make the fit of components or construction of walls difficult.

Determining the flatness of a concrete slab using the astm e 1155 method provides more accurate and reliable results compared to the conventional straightedge specification for 1 4 in 10 and 1 8 in 10. 40mm from the designed level. Thus a tolerance in level of a ceiling amounting to inch in 10. Section 4 is the longest part of aci 117 covering tolerances for cast in place concrete for buildings including walls floors and slabs.

Other tolerances in this section dictate the maximum deviation from the planned location of the top surface elevation and the cross sectional dimensions of piers and footings. F numbers were developed in the 1980s to provide a systematic quantitative way to indicate the flatness and levelness of a concrete floor. Cement and concrete terminology by american concrete institute aci committee 116. Areas within 1 5 meters of walls columns or.

Floors shall be built to appropriate tolerances. Level within a 3mm deviation per 1m for floors up to 6m across measured at the furthest points across the full width of the floor. Setting tolerances also demonstrate that some degree of variation is inherent in all building work. Tolerances can be defined as the allowable variations from the specified values or performance levels.

Tolerances for concrete surfaces introduction. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117. Be a 30mm fall across the slab and the floor levels still comply with tolerances given in as 36005. Preparation of concrete floors to receive resilient flooring.

They are calculated using the standards set forth in astm e1155 which is the standard test method for determining f f floor flatness and f l floor levelness numbers the american concrete institute indicates acceptable ranges for flatness and levelness in aci 302 1 guide.