Concrete Placement Sample Clauses
The Concrete Placement clause defines the requirements and procedures for the proper placement of concrete during construction. It typically outlines acceptable methods for pouring, spreading, and consolidating concrete, as well as environmental conditions such as temperature and weather that must be considered to ensure quality. This clause ensures that concrete is installed correctly to achieve the desired structural integrity and durability, thereby minimizing the risk of defects or failures due to improper placement.
Concrete Placement. Deposit concrete only in the presence of and by methods approved by the Department. Ensure all reinforcement is free of dirt, loose rust, grease, and other deleterious substances. Accurately place all items to be encased in the concrete in the position shown on the Plans and firmly held during the placing and setting of the concrete.
1. Casting tolerances (overall height and width measured at the face adjacent to the mold when cast): 10 feet or under ±1/8 inch Over 10 feet + 1/8 inch, - 3/16 inch Thickness ±1/8 inch Out of square 1/4 inch
2. After casting tolerances: Bowing and warpage: 1/360 panel dimension with a maximum of ¾ inch; differential bowing or camber between adjacent members of the same design shall not exceed ⅜ inch.
3. Position of cast-in items: Recessed handling Inserts ± ⅜ inch Reinforcement ± ½ inch Threaded inserts ± ¼ inch
Concrete Placement. A. Under no circumstances shall the pile holes be left open for periods longer than 2 hours.
Concrete Placement. A. Before placing concrete, verify that installation of formwork, reinforcement, embedded items, and vapor retarder is complete and that required inspections are completed.
1. Immediately prior to concrete placement, inspect vapor retarder for damage and deficient installation, and repair defective areas.
2. Provide continuous inspection of vapor retarder during concrete placement and make necessary repairs to damaged areas as Work progresses.
B. Notify Architect and testing and inspection agencies 24 hours prior to commencement of concrete placement.
C. Do not add water to concrete during delivery, at Project site, or during placement unless approved by Architect in writing, but not to exceed the amount indicated on the concrete delivery ticket.
1. Do not add water to concrete after adding high-range water-reducing admixtures to mixture.
D. Before test sampling and placing concrete, water may be added at Project site, subject to limitations of ACI 301 (ACI 301M), but not to exceed the amount indicated on the concrete delivery ticket.
1. Do not add water to concrete after adding high-range water-reducing admixtures to mixture.
E. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete is placed on concrete that has hardened enough to cause seams or planes of weakness.
1. If a section cannot be placed continuously, provide construction joints as indicated.
2. Deposit concrete to avoid segregation.
3. Deposit concrete in horizontal layers of depth not to exceed formwork design pressures and in a manner to avoid inclined construction joints.
4. Consolidate placed concrete with mechanical vibrating equipment in accordance with ACI 301 (ACI 301M).
a. Do not use vibrators to transport concrete inside forms.
b. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches (150 mm) into preceding layer.
c. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity.
d. At each insertion, limit duration of vibration to time necessary to consolidate concrete, and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.
Concrete Placement. Structural steel prior to being enclosed or covered.
Concrete Placement. Deposit concrete only in the presence of and by methods approved by the Department. Ensure all reinforcement is free of dirt, loose rust, grease, and other deleterious substances. Accurately place all items to be encased in the concrete in the position shown on the Plans and firmly held during the placing and setting of the concrete.
Concrete Placement. During the pours, the CONSULTANT shall be on site continuously, as required by code, to monitor placement. The CONSULTANT shall:
Concrete Placement. The concrete shall not be placed until the sub-grade has been inspected for compaction and moisture. The concrete shall be compacted with an approved internal type vibrator, or by hand spudding and tamping. The surface shall be shaped by use of a steel tool to produce the sections shown on the drawings. The edges shall be rounded with edgers to form the radii as directed by the Engineer. The surfaces shall be finished with a wooden or metallic float and brushed. All concrete shall be cured in accordance with the Overland Park Municipal Code.
Concrete Placement. A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections have been performed.
B. Do not add water to concrete during delivery, at Project site, or during placement unless approved by Engineer.
C. Before test sampling and placing concrete, water may be added at Project site, subject to limitations of ACI 301.
1. Do not add water to concrete after adding high-range water-reducing admixtures to mixture.
D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete will be placed on concrete that has hardened enough to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints as indicated. Deposit concrete to avoid segregation.
1. Deposit concrete in horizontal layers of depth not to exceed formwork design pressures and in a manner to avoid inclined construction joints.
2. Consolidate placed concrete with mechanical vibrating equipment according to ACI 301.
3. Do not use vibrators to transport concrete. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6-inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.
E. Deposit and consolidate concrete for floors in continuous operation, within limits of construction joints, until placement of panel or section is complete.
1. Consolidate concrete during placement operations so concrete is thoroughly worked around reinforcement and other embedded items and into corners.
2. Maintain reinforcement in position on chairs during concrete placement.
3. Screed slab surfaces with a straightedge and strike off to correct elevations.
4. Slope surfaces uniformly to drains where required.
5. Begin initial floating using bull floats or darbies to form a uniform and open- textured surface plane, before excess bleedwater appears on the surface. Do not further disturb slab surfaces before starting finishing operations.
F. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.
1. When averag...
Concrete Placement. A. Pile concrete shall be placed immediately after the completion of drilling and inspection of the pile hole and the placement of reinforcing steel.
1. Under no circumstances shall the pile holes be left open for periods longer than 2 hours.
2. If delay in placement of reinforcing steel and concrete is expected, the pile hole shall be properly backfilled and then redrilled when ready. The redrilled hole may be larger and/or deeper than the original pile hole, as determined by a Professional Engineer.
B. Forms shall be used to maintain the specified dimensions of the portions of concrete piles above ground level.
C. If a dry pile hole cannot be achieved, as per the requirements of Section 4-4.