SECTION 31 6613
LOW-IMPACT FOUNDATIONS
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PART 1
1.1
1.2
1.3
1.4
GENERAL
SUMMARY
A.
Section Includes:
1.
Low-impact pin pile foundations.
B.
Related Sections:
1.
Division 01: Administrative, procedural, and temporary work requirements.
REFERENCES
A.
American Concrete Institute (ACI) 301 - Specifications for Structural Concrete for Buildings.
B.
ASTM International:
1.
A53/A53M - Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated,
Welded and Seamless.
2.
A123/A123M - Standard Specification for Zinc (Hot-Galvanized) Coatings on Iron and Steel
Products.
3.
C33 - Standard Specification for Concrete Aggregates.
4.
C150 - Portland Cement.
5.
C260 - Standard Specification for Air-Entraining Admixtures for Concrete.
6.
C1116/C1116M - Standard Specification for Fiber-Reinforced Concrete and Shotcrete.
SUBMITTALS
A.
Submittals for Review:
1.
Shop Drawings: Indicate foundation model numbers, pin lengths, and layout.
B.
Quality Control Submittals:
1.
Evaluation of foundation system load capacities for Project [, performed by Professional
Engineer licensed in State in which Project is located].
C.
Sustainable Design Submittals:
1.
[Regional Materials.]
PROJECT CONDITIONS
A.
Minimize use of heavy equipment and alteration of site soils and vegetation.
Pin Foundations, Inc.
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PART 2
2.1
2.2
2.3
MANUFACTURERS
A.
Contract Documents are based on Diamond Pier [DP-200E] [DP-100E] [DP-75E] by Pin Foundations,
Inc. (www.pinfoundations.com)
B.
Substitutions: [Under provisions of Division 01.] [Not permitted.]
MATERIALS
A.
Concrete Materials:
1.
Portland cement: ASTM C150.
2.
Aggregates: ASTM C33.
3.
Air entraining admixture: ASTM C260.
4.
Reinforcing: ASTM C1116/C1116M, 1-1/2 inch synthetic macro-fibers.
B.
Steel Pipe: ASTM A153, Schedule 40, galvanized to ASTM A123.
C.
Anchor Bolts: ASTM A307, Grade A.
D.
Sealant: Sliconized adhesive type.
E.
Pin Caps: Ultraviolet-resistant vinyl.
COMPONENTS
A.
Heads:
1.
Precast concrete, minimum [4000] [5000] PSI compressive strength at 28 days, minimum 3/8
inch aggregate, 5 to 7 percent total air entrainment.
2.
Concrete: In accordance with ACI 301.
3.
Reinforcing: 1-1/2 inch synthetic macro-fibers.
B.
Pins:
1.
Galvanized steel pipe with square cut driving ends; four pins per pier.
2.
Capacity relative to length, diameter, and driving angle in site specific soils.
3.
Design pins using utilize stamped local geotechnical evaluations and complete project loading
and site information.
4.
Pin size: [2.375] [1.9] [1.67] inch outside diameter.
C.
Connections:
1.
Connections: [Single galvanized anchor bolt.] [Four galvanized anchor bolts.]
2.
Single anchor bolts: [5/8] [3/4] inch diameter, galvanized.
3.
Four-bolt configuration: [1/2] [5/8] [3/4] inch bolt diameter.
PART 3
3.1
PRODUCTS
EXECUTION
INSTALLATION
A.
Install foundations in accordance with manufacturer’s instructions and approved Shop Drawings.
B.
Use full-length pins without splicing or coupling.
C.
Dig conical hole of approximately same shape as bottom half of pier and slightly deeper than pier,
leaving loose soils directly below pier. On slopes, dig hole deeper on uphill side so that pier sits level.
D.
Position pier in hole to midpoint, level and centered on alignment. Backfill around sides of pier [to
grade] [to completely cover pier] without over-compacting.
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E.
Slide opposing pins through driving cavities in pier; center pins in driving cavities.
F.
Set pins into soil 12 to 24 inches using sledge hammer or sliding post driver, then drive pins
alternately in increments using automatic hammer.
G.
Periodically check piers for level and alignment during pin driving.
H.
Finish driving pin using automatic hammer, leaving 1 inch protruding from top of cavity.
I.
Do not drive pins such that piers are more than 5 degrees out of level; rotate around pier, driving pins
in increments.
J.
Minimize damage to piers during pin driving.
K.
Pins may be cut off if they meet substantial resistance in soil after driving; refer to manufacturer’s
instructions.
L.
Cover exposed pin ends with cap; seal to concrete with sealant.
END OF SECTION
Pin Foundations, Inc.
04/20/12
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