The Series 1400 accommodates a wide range of vehicle and door height variations by the means of a full width head curtain, held taut by tension straps at each end. The supported head curtain is sloped to ensure adequate drainage.

A split curtain, adjustable by the means of pull ropes and an intermediate foam pad are a few of the head curtain options.

Suggested Specification:

Dock seal shall have a Dynalon base fabric, or other fabric as specified. The Dynalon cover shall enclose a polyurethane foam pad, which is to be chemically welded to a 2" thick, pressure treated wood frame, kiln dried before and after treating. (Steel frame is optional.) The cover shall wrap behind the wood frame and be secured with stainless steel staples for weather-tight construction. Adequate air exhausts and drain holes are to be provided in covers, and both shall be designed to prohibit moisture infiltration. Side pads shall include full length, highly visible guide stripes. Mounting hardware shall have a rust resistant coating.

Standard unit shall consist of two side pads that mount vertically along both sides of the door opening. The head curtain shall be secured at the building face by the means of a pressure treated, kiln dried before and after treating, 2" x 4" wood head frame. The 2" x 4" wood frame shall be mounted over the top of the side pads with the head curtain tapering away to provide for adequate drainage. Unit shall include intermediate "Scotchply™" stays, a front tubular metal support and tension straps to keep head curtain taut. The support tubing shall be held in place by a fabric sleeve sewn into the head curtain.

Here's how a performance based specification would be written:

FABRIC: Dock seal or shelter shall incorporate a Dynalon cover having the characteristics listed below. All bidders must submit certified test results with bid. The manufacturer shall state the characteristics of the fabric offered and that all tests are done in accordance with Federal Standard 191 and the specific method as listed below. Wear characteristics of any substitute material shall meet or exceed performance specifications.

Summary of properties of fabrics per Federal Standard 191

Coated Fabric: Dynalon
Tear strength (Per Lbs., Method 5134): 300 x 300
*Abrasion Resistance (Cycles, Method 5306): 6000
Tensile Strength (Per Lbs., Method 5100): 1200 x 1200
Cold Resistance (At -40°F, Method 5874): Pass

Coated Fabric: Dynaflex
Tear strength (Per Lbs., Method 5134): 165 x 165
*Abrasion Resistance (Cycles, Method 5306): 1250
Tensile Strength (Per Lbs., Method 5100): 550 x 575
Cold Resistance (At -40°F, Method 5874): Pass

*H-22 Wheel, 1000 Gram Load, End Point-First Exposure to Base Fabric.