topping mixture to exceed 5 degrees C (10 degrees F) 10 degrees F
at the time of placing. Place the topping and finish as
[indicated] [specified herein].
[3.8.2
Flat Floor Finishes
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NOTE: Use these paragraphs where floor flatness is
critical. Indicate areas where these requirements
apply. Flatness will affect the appearance and
function of finishes applied to the concrete and in
situations such as large or long expanses of glossy
floor materials. Low tolerance for product (thin set
tile and wood gymnasium floors, etc.) and equipment
will dictate to the designer to specify higher than
normal flatness requirements. The numbers provided
in brackets are typical numbers, but A/E should
research and select F numbers high enough to get
desired results but not so high as to cause undue
cost increases and construction problems. Ff/FL
20/15 is equivalent to 8 mm in 5.05 mm (5/16 inches
in 10 feet)5/16 inches in 10 feet. This test method
is not suitable for unshored deck. Fitted
partitions need FL greater than or equal to 25.
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ACI 302.1R. Construct in accordance with one of the methods recommended in
Table 7.15.3, "Typical Composite Ff/FL Values for Various Construction
Methods." ACI 117 for tolerance tested by ASTM E 1155/E 1155M.
a.
Specified Conventional Value:
Floor Flatness (Ff) [20] [_____]
[13] [_____] minimum
Floor Levelness (FL) [15] [_____]
[10] [_____] minimum
b.
Specified Industrial:
Floor Flatness (Ff) [30] [_____]
[15] [_____] minimum
Floor Levelness (FL) [20] [_____]
[10] [_____] minimum
3.8.2.1
Measurement of Floor Tolerances
Test slab within 24 hours of the final troweling. Provide tests to
Contracting Officer within 12 hours after collecting the data. Floor
flatness inspector shall provide a tolerance report which shall include:
a.
Key plan showing location of data collected.
b.
Results required by ASTM E 1155/E 1155M.
3.8.2.2
Remedies for Out of Tolerance Work
Contractor shall repair and retest any floors not meeting specified
tolerances. Prior to repair, Contractor shall submit and receive approval
for the proposed repair, including product data from any materials
proposed. Repairs shall not result in damage to structural integrity of
the floor. For floors exposed to public view, repairs shall not result in
any uneven or unusual coloring of the surface.
SECTION 03300N
Page 41
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