specs

SECTION 02351
CONCRETE FOOTINGS
PART 1 - GENERAL
1.01. SUMMARY
A. Section Includes:
1. Excavating and cleaning.
2. Placing concrete and reinforcing steel.
3. Furnish templates and place anchor bolts and dowels.
B. Products Installed, not Furnished Under This Section:
1. Reinforcing Steel
2. Structural Concrete
1.02. SUBMITTALS
A. Submit shop drawings of reinforcement, dowels and anchor bolts.
B. Submit a log of footings installed indicating the following:
1. Identification mark.
2. Footing size.
3. Top of footing elevation.
4. Top of bearing strata elevation (if applicable).
5. Bottom of footing elevation.
6. Concrete quantity.
7. Concrete fill placed under footing.
PART 2 - PRODUCTS - Not applicable (see related sections)
PART 3 - EXECUTION
3.01. INSTALLATION
A. Excavating:
1. Excavate for footings of required size and depth (minimum).
2. Excavate to required minimum depth below finish grade or finish floor, or to required bearing strata.
3. Clean bottom of excavations of loose dirt, debris and loose material.
4. Where soft material is encountered, excavate to firm bearing.
5. Fill over-excavations with concrete.
B. Tolerances:
1. Maximum lateral variation off of centerlines: 2 inches
2. Footing size: not smaller than required sizes
3. Top elevation: plus one inch, minus 2 inches
4. Bottom (bearing) surface: level to within one vertical to ten horizontal.
5. Placement of anchor bolts: within 1/4 inch any direction
C. Drainage and Pumping:
1. Maintain bearing surface of footing excavations dry.
2. Remove accumulated water and ice and excavate to firm, dry surface.
D. Reinforcing and Anchor Bolts:
1. Tie reinforcing securely into cages or mats.
2. Support reinforcing above ground with special chairs or precast bolsters.
3. Secure reinforcing and anchor bolts in place, prevent shifting during placement of concrete.
4. Use templates to position anchor bolts accurately.
E. Concreting:
1. Do not place concrete into or through standing water or mud.
2. Do not place concrete on frozen subgrade.
3. Place concrete within 8 hours of excavating.
4. Place concrete in one continuous operation for each footing.
5. Consolidate concrete by vibrating.
NAPA CENTURY CENTER XD 12
#165582