specs

Section 03100
Page 4
construction joints in exposed concrete faces, tack a continuous strip of dressed lumber, one inch
thick, to inside of wall or grade beam form, with its lower edge at line of construction joint. About
one hour after placing concrete in lower part of wall remove strip, level off irregularities which
appear in joint line with wood float and remove any laitance present.
d. Provide shear keys as required in construction joints.
3.02. REMOVAL OF FORMS
A. Remove forms completely, unless specifically required otherwise.
B. Remove forms carefully to avoid damage to concrete surfaces.
C. Do not remove forms until concrete has adequately set.
1. Clamps and tie rods may be loosened after 24 hours following placement of concrete.
a. Maintain sufficient ties to hold forms in place.
b. Withdraw through-wall ties toward the inside (or unexposed) face of walls.
c. Prevent spalling during removal of ties.
2. Concrete strength tests may be used as evidence that concrete has adequately set for form removal.
a. Minimum strength shall be 75% of design strength.
D. Remove forms sequentially and in small units to prevent shock, overload or undue eccentricity in the
structure. Do not store materials or place heavy equipment on structures for which forms have been removed
unless concrete strength is equal to design strength, or re-shores have been installed. Remove forms in a
manner that does not require a large portion of the structure to be self-supporting (i.e. a full bay of framing),
and install shores immediately as form removal progresses.
E. Do not remove forms until supporting structures (columns, foundation or hangers) are permanently in place
and full strength.
END OF SECTION
NAPA CENTURY CENTER XD 12
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