SHAFT 1.250 dia. thru to inner hub
BEARINGS Ball-Bower/BCA
SPRINGS Oil tempered blue steel, mounted in spring housing rotating on oil-less nylon bearings
BARREL Heavy duty pipe 2”x.212 wall with 8”x .062 wall shield (Max. deflection 0.003 per ft.)
BRACKETS Steel plate .125 min. (As reg.)
HOOD 24 ga. galvanized paint loc material. Finished acrylic paint applied by electro-static process
WALL GUIDES roll formed “C”channel steel one piece (2 reg.) 11 ga. 1¾”x 2”
SOLID SLAT Interlocking slats, rolled from 22 ga. hot galvanized steel 3” wide x 3/4”deep coiling. Slats are of sufficient strength to withstand a minimum wind load of 20 lbs. per sq. ft. End locks on opposite ends of alternating slats to maintain alignment. Foot piece to be extruded aluminum
standard“T”frame. Permanently corrosion-free for wet ground conditions

STYLE No.516 -Straight Link Pattern consists of solid aluminum 3/8”horizontal rods, solid aluminum links 1/8”horizontal rods, solid aluminum links 1/8”thick. Horizontal spacer tubes of tough corrosion-proof colored polyethylene. Distance between horizontal rods 1¼”, bottom bars, extruded aluminum

STYLE No. 516-Brick Pattern shall be of solid 3/8”aluminum rods and 3/8”aluminum or polyethylene tubing reinforced inside with solid 5/16”aluminum rods. Connecting links shall be solid aluminum 

BOTTOM BAR Bottom bar shall consist of steel angle to provide stiffness at the bottom of curtains. This member shall be bolted to curtains. Convenient lifting handle is mounted on the bottom rail. A single lift is placed in the center on narrow doors. Two handles placed for balanced lift are furnished on wide doors

LOCKING DEVICE Standard locking device shall consist of hasp and pins. Cylinder bolt lock can be provided as an extra and can be affixed at the center (good for up to 7 ft. wide door) or at left&right . (Bolts can be provided, this lock is pick-proof.)