tables to cover all parts of the structure.
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Level and grade tolerance measurements of slabs shall be made as soon as
possible after finishing. When forms or shoring are used, the measurements
shall be made prior to removal. Tolerances are not cumulative. The most
restrictive tolerance controls. Tolerances shall not extend the structure
beyond legal boundaries. Except as specified otherwise, plus tolerance
increases the amount or dimension to which it applies, or raises a level
alignment and minus tolerance decreases the amount or dimension to which it
applied, or lowers a level alignment. A tolerance without sign means plus
or minus. Where only one signed tolerance is specified, there is no limit
in the other direction. The unformed finished surfaces subject to
high-velocity flow (12 m/s) (40 fps) shall be finished to meet the
tolerances for A-HV surfaces specified in Table, "TOLERANCES FOR FINISHED
FORMED CONCRETE SURFACES".
The definitions of the terms used in the following tabulations are used as
defined and used in ACI 117. Level and grade tolerance measurements of
slabs shall be made as soon as possible after finishing.
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NOTE: The following table to be used with SI units.
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TOLERANCES FOR FOUNDATIONS
(1)
Lateral alignment
As cast to the center of gravity as specified;
0.02 times width of footing in direction
of misplacement but not more than .......................... 50 mm
Supporting masonry construction ............................ 13 mm
(2)
Level alignment
Top of footings supporting masonry ......................... 13 mm
Top of other footings ..................................... +13 mm
..................................... -50 mm
(3)
Cross-sectional dimensions
Horizontal dimensions of formed members ................... +50 mm
................... -13 mm
Horizontal dimensions of unformed members cast against soil
600 mm or less ....................................... +75 mm
....................................... -13 mm
Greater than 600 mm
but less than 1800 mm ............................... +150 mm
................................... -13 mm
Over 1.8 m .......................................... +300 mm
SECTION 03700
Page 18
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