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PART 1

GENERAL

1.1 SCOPE
A.

Post frame building column consisting of a pre-cast concrete embedded portion, a wood upper portion, a steel bracket connection between wood and concrete, and galvanized steel uplift anchors for post uplift resistance.

1.2 DESIGN GUIDANCE
A.

Engineering Design Manual for Series 6300, 6400, 8300, 8400, PermaColumns by David R. Bohnhoff, Ph. D., P.E., Professor, Biological Systems Engineering, University of Wisconsin-Madison

B.

Perma-Column Design and Use Guide for PC6300, PC6400, PC6600, PC8300, and PC8400 Models by Brent Leatherman, P.E., Timber Tech Engineering, Inc.

1.3 STANDARDS
A.

Building Code Requirements for Structural Concrete by the American Concrete Institute (ACI 318).

B.

Manual of Steel Construction, Load and Resistance Factor Design by The American Institute of Steel Construction (AISC).

C.

The National Design Specification for Wood Construction (NDS) by The American Forest and Paper Association (AF&PA).

D.

ANSI\ASAE EP 559, Design Requirements and Bending Properties for Mechanically Laminated Columns.

PART 2

PRODUCTS

2.1 PERMA-COLUMNS
A.

Manufacturer: Perma-Column, Inc.; Contact: 400 Carol Ann Lane Ossian, IN 46777; Telephone: (800) 622-7190; Fax: (260) 622-7192; Website: www.permacolumn.com

B. Models:

1.     PC 6300: for a 3 ply, 2x6 Mechanically Laminated Column (5½” x 4½”)
2.     PC 6400: for a 4 ply, 2x6 Mechanically Laminated Column (5½” x 6”)
3.     PC 6600: for a 6x6 Solid Sawn Post Column (5½” x 5½”)
4.     PC 8300: for a 3 ply, 2x8 Mechanically Laminated Column (7¼” x 4½”)
5.     PC 8400: for a 4 ply, 2x8 Mechanically Laminated Column (7¼” x 6”)

2.2 MATERIALS
A. Concrete Column:

10,000 (Nominal) psi pre-cast self consolidating concrete (SCC) with four (4) continuous vertical reinforcing bars of A706 weldable 60 ksi yield strength steel. Number 4 bars are used for the PC6300, PC6400, and PC6600 while number 5 bars are used for the PC8300 and PC8400 models. Superplasticizers and polymer fiber reinforcement are added as well as other admixtures to increase freeze/thaw resistance, rust resistance, flexural and compressive strength as well as optimizing the hydration process.

B. Uplift Anchors:

Galvanized, 50 ksi yield strength steel available in two sizes, PC20UA 2”x 2”x 8.5”x 0.134”; PC25UA 2”x 2”x 12”x 0.134”

C. Steel Bracket:

A U-shaped ¼” A36 steel bracket with 5/8” diameters holes for bolts, and 5/16” diameter holes for screws. The bracket uses ½” Grade 2 (ASTM A307) bolts with hex nuts torqued to 110 foot-pounds as well as ¼”x3” strong drive screws (SDS) by Simpson Strong-Tie or equal.

2.3 FABRICATION
A.

The concrete is produced in a controlled environment using a digital batching system to ensure precise curing.

B.

The steel U-bracket is welded to the vertical reinforcing bars to transfer bending loads directly into the foundation.

C.

The wood upper portion may be preassembled to the steel bracket, or assembled in the field.

2.5 HARDWARE
A.

¼” x 3” SDS by Simpson Strong-Tie or similar. Manufacturer: Simpson Strong-Tie Co; website: www.strongtie.com
a.   (4) screws required for PC6300, PC6400 and PC6600.
b.   (8) screws required for PC8300 and PC8400.

B.

½” Diameter A307 Bolts
a.   (2) ½ “x 6” bolt with nut and washer required for PC6300 and PC8300.
b.   (2) ½ “x 7” bolt with nut and washer required for PC6600.
c.   (2) ½ “x 8” bolt with nut and washer required for PC6400 and PC8400.

PART 3

EXECUTION

3.1 INSTALLATION
A.

Columns to be erected and installed according to the Contract Documents and the Installation Manual by Perma-Column, Inc.

B.

Protect installed product from damage during handling, storage, and construction. Repair or replace damaged installed products.