Complete Compiled Specification.pdf - Peck Ormsby Construction

3. Locate construction joints not shown on the Drawings so as not to impair the strength
of the structure. Provide keyways at least 1-1/2" deep in walls, slabs, and between
walls and footings.
4. Where load transfer-slip dowel devices are used, install so that one end of each
dowel bar is free to move. Continue reinforcement across construction joints.
5. Do not tool edges of construction joints at interior concrete slabs.
B. Contraction (Control) Joints: Provide contraction (control) joints, sectioning concrete into
areas as shown on Drawings. If not shown, provide joints at 15 feet on center, locating joints
under partitions where possible. Construct contraction joints for a depth equal to at least 1/4
concrete thickness or a minimum of 1".
1. Form contraction joints using powered saws equipped with shatterproof abrasive or
diamond-rimmed blades. Cut joints into hardened concrete as soon as surface will
not be torn, abraded, or otherwise damaged by cutting action.
3.04 INSTALLATION OF EMBEDDED ITEMS
A. General: Set and build into work anchorage devices and other embedded items required for
other work that is attached to, or supported by, cast-in-place concrete. Use setting drawings,
diagrams, instructions, and directions provided by suppliers of items to be attached thereto.
B. Forms for Slabs: Set edge forms bulkheads and intermediate screed strips for slabs to obtain
required elevations and contours in finished surfaces. Provide and secure units to support
screed strips using of strike-off templates or compacting type screeds.
3.05 PREPARATION OF FORM SURFACES
A. Coat contact surfaces of forms with an approved, non-residual form-coating compound
before reinforcement is placed.
B. Do not allow excess form-coating material to accumulate in forms or to come into contact with
in-place concrete surfaces against which fresh concrete will be placed. Apply in compliance
with manufacturer's instructions.
C. Coat steel forms with a non-staining, rust-preventative form oil or otherwise protect against
rusting.
3.06 CONCRETE PLACEMENT
A. Inspection: Before placing concrete, inspect and complete formwork installation, reinforcing
steel and items to be embedded or cast-in. Notify other crafts to permit installation of their
work; cooperate with other trades in setting such work.
B. General: Comply with ACI 304, and as herein specified.
C. Coordinate the installation of joint materials with placement of forms and reinforcing steel.
D. Deposit concrete continuously or in layers of such thickness that no concrete will be placed
on concrete that has hardened sufficiently to cause the formation of seals or planes
of weakness. If a section cannot be placed continuously, provide construction joints as
herein specified. Deposit concrete to avoid segregation at its final location.
E. Placing Concrete in Forms: Deposit concrete in forms in horizontal layers not deeper than
24" and in a manner to avoid inclined construction joints. Where placement consists of
SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION MARCH 2, 2009
CONCRETE WORK 03300 - 8