direction of water flow
1.6.2
Floor Finish by the F-Number System
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NOTE: Delete this paragraph if floor finish
tolerances are not applicable. If surface is
subjected to high-velocity flow (12 m/s (40 fps) or
greater), the tolerances for Class A-HV surfaces
specified under paragraph Formed Concrete Surfaces
above, apply. Be aware that the "very flat surface"
is difficult to obtain and may require special
finishing techniques.
Refer to EM-1110-2-2000 for guidance on the F-Number
System. Refer to the appropriate DM for a list of
floor locations and F-Numbers to insert in the
blanks.
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The flatness and levelness of the floors in the following listed areas
shall be carefully controlled and the tolerances shall be measured by the
F-Number system:
[_____]
[_____]
The Contractor shall furnish a floor profilograph or other equipment
capable of measuring the floor flatness (FF) number and the floor levelness
(FL) number, in accordance with ASTM E 1155M ASTM E 1155. The Contractor
shall perform the tolerance measurements while being observed by the
Contracting Officer. The tolerance requirement will be
FF[_____]/FL[_____]. Special finishing procedures and special care will be
required to meet these tolerances.
1.6.3
Tunnel Linings, Conduits, and Filling and Emptying Culverts
Water Conveying:
Lateral alignment
Centerline alignment
13 mm 1/2 inch
0.005 times inside dimension
Level alignment
Profile grade
13 mm 1/2 inch
Cross-Sectional dimension
Tunnel and culvert lining
-0 mm 0 inch
1.6.4
Appearance
Permanently exposed surfaces shall be cleaned, if stained or otherwise
discolored, by a method that does not harm the concrete and that is
approved by the Contracting Officer.
SECTION 03301A
Page 20
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