Duro-Last EHD Screws User Manual

DURO-LAST® EHD SCREWS

Description:

Duro-Last®, Inc. requires the use of Duro-Coated Screws for the mechanical fastening of the Duro-Last roofing system and insulation board. Duro-Last EHD Screws are #15 diameter fasteners equipped with a P-3 truss head, and a drill point.

When greater fastener pullout resistance is needed than can be achieved with the Duro-Last HD Screw, the Duro-Last EHD Screw should be used.

Duro-Last HD Screws can be used in most types of roofing applicati ons. These Duro- Coated Screws must pass twice the FM 4470 standard for corrosion resistance, totaling 30 cycles in a Kesternich cabinet. Duro-Last, Inc. also requires that all Duro-Coated Screws pass 20º and 40º bend tests (hardness) and be able to p enetrate a 20 gauge deck in under three

seconds with a 50 lb. (222 N) load.

Installation:

1. Penetration into all deck types is 1 in. (25 mm) minimum, from the top surface of the deck.

Note:

• Duro-Last, Inc. stocks EHD screws in the sizes

noted in the table to the right. Addit ional s izes are available on a drop ship basis. Please allow adequate time for ordering and delivery of special orders.

DATA SHEET

EHD SCREW DIME NSIONS

Screw Length

2 in. (51 mm) 2 in. (51 mm)

3 in. (76 mm) 2.875 in. (73 m m) 4 in. (102 mm ) 2.875 in. (98 m m) 5 in. (127 mm ) 3.875 in. (98 mm) 6 in. (152 mm ) 3.875 in. (98 mm) 7 in. (178 mm ) 3.875 in. (98 mm) 8 in. (203 mm ) 3.875 in. (98 mm) 9 in. (229 mm ) 3.875 in. (98 mm)

10 in. (254 mm) 3.875 in. (98 mm) 11 in. (279 mm) 3.875 in. (98 mm) 12 in. (305 mm) 3.875 in. (98 mm) 14 in. (355 mm) 3.875 in. (98 mm) 16 in. (406 mm) 3.875 in. (98 mm) 18 in. (457 mm) 3.875 in. (98 mm) 20 in. (508 mm) 3.875 in. (98 mm)

Thread Length

Quantity per

Bucket

1000 1000 1000 1000 1000

500 500 500 500 500 500 250 250 250 250

Duro-Last: The Proven Performer®

www.duro-last.com

"Duro-Last " an d " The World's Best Roof" are registered marks owned by Duro-Las t , Inc.

800-248-0280

2009