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Cobb Lumber Construction Supplies & Services

Welcome to Cobb Lumber!

We are a family owned business that has been providing services and products to the construction industry since 1978.

Combined, our family has over 90 years of experience in the building materials industry. We service the requirements of professional industry buyers, residential and commercial contractors, home owners and hobbyists.

Silt Fence Specification Sheets

COMMERCIAL SPECIFICATION SHEET
PROPERTY TEST METHOD MINIMUM ROLL / AVERAGE VALUE
GRAB TENSILE, LBS ASTM-D-4632 60 LBS
GRAB ELONGATION % ASTM-D-4632 20/25%
MULLEN BURST, PSI ASTM-D-3786 165
PUNCTURE, LBS ASTM-D-4833 30
TRAPEZODAL TEAR, LBS ASTM-D-4533 30 LBS
UV RESISTENCE, %SR ASTM-D-4355 50% @ 500 HRS
AOS, US SIEVE # ASTM-D-4751 40
PERMITTIVITY, (1/SEC) ASTM-D-4491 .20 (S-1)
GAL/MIN/SQ.FT 15 GAL/MIN/FT2



DOT FABRIC
PROPERTY TEST METHOD MINIMUM ROLL / AVERAGE VALUE
MD GRAB TENSILE, LBS ASTM-D-4632 209 LBS
TD GRAB TENSILE, LBS ASTM-D-4632 172 LBS
MD GRAB ELONGATION % ASTM-D-4632 21%
TD GRAB ELONGATION % ASTM-D-4632 27%
MULLEN BURST, PSI ASTM-D-3786 310
MD TRAPAZOIDAL TEAR, LBS ASTM-D-4533 74 LBS
TD TRAPAZOIDAL TEAR, LBS ASTM-D-4533 66 LBS
UV RESISTENCE, % SR ASTM-D-4355 80% @ 500 HOURS
AOS, US SIEVE # ASTM-D-4751 40
PERMITTIVITY (1/SEC) GAL/MIN/SQ.FT ASTM-D-4491 .20 (S-1)
FLOW RATE ASTM-D-4491 12.5 GAL/MIN.FT2



NON-WOVEN FABRIC SPECIFICATIONS
PROPERTY TEST METHOD MINIMUM ROLL / AVERAGE VALUE
GRAB TENSILE ASTM-D4632 140 LBS
GRAB ELONGATION ASTM-D4632 50%
TRAPEZOID TEAR ASTM-D4533 58 LBS
PUNCTURE RESISTANCE ASTM-D4833 80 LBS
PERMITTIVITY ASTM-D4491 17 SEC-1
WATER FLOW ASTM-D4491 115 GPM/FT2
A.O.S ASTM-D4751 70 U.S. SIEVE
U.V. RESISTENCE ASTM-D4355 70%/500 HRS
 

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