Specifications

07/22/10 03001-3
PART 3 EXECUTION
3.01 FORMWORK ERECTION
A. Conforms to the shapes, lines, and dimensions of the members as called for on the Drawings.
B. Provide bracing to ensure stability of formwork.
C. Design and construct forms, bracing, and supports to withstand the pressure of freshly placed
concrete without bow or deflection.
D. Hand trim sides and bottom of earth forms; remove loose dirt.
E. Coordinate Work on Drawings in forming and setting openings, recesses, chases, sleeves, bolts,
anchors, and other inserts.
F. Substantial and sufficiently tight to prevent leakage of mortar. Check forms prior to placing
concrete and tighten as required to produce flush surfaces.
G. Tie metal remaining in the concrete to be at least 3 inches back of the concrete face. Plug holes
left by the tie ends with grout.
H. Chamfer corners of beams, columns, walls and exposed edges or corners of concrete with 3/4
inch by 3/4 inch wood chamfer strips unless otherwise shown on Drawings.
I. Clean forms and apply form release agents or wet forms prior to concrete placement.
J. Remove forms in such a manner as to insure the complete safety of the structure. Where the
structure as a whole is supported on shores, the removable floor forms, beams and girder sides,
columns and similar vertical forms may be removed only after concrete has reached 2/3 of its
design strength by test and is sufficiently hard not to be injured during form removal. In no case
should supporting forms or shoring be removed until the members have acquired sufficient
strength to support their weight and the load safely thereon.
3.02 REINFORCEMENT
A. Before placing concrete, clean reinforcement of foreign particles or coatings.
B. Place, support, and secure reinforcement against displacement.
C. Lap welded wire mesh at least one full mesh and lace splices with wire. Offset end laps in
adjacent widths to prevent continuous laps in either direction.
D. Avoid splices at points of maximum stress. Provide sufficient lap to transfer the stress between
bars by bond and shear.
E. Make bends for stirrups and ties on bars 5/8 inches in diameter and less, around a pin having a
diameter not less than four times the thickness of the bar. Make bends for other bars around a pin
having a diameter not less than six times the minimum thickness of the bar, except that for bars
larger than one inch but less than 1-3/4 inches, the pin can not be less than eight times the
minimum thickness of the bar. Bend all bars cold.
F. Splices and Offsets in Reinforcement: In slabs, beams, and girders, avoid splices of
reinforcement at points of maximum stress. Provide sufficient lap to transfer the stress between
bars by bond and shear and meet the requirements of ACI 318.
Where changes in the cross section of a column occur, offset the longitudinal bars in a region
where lateral support is afforded. Where offset, the slope of the inclined portion should not be