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GENERAL STEP-BY-STEP GUILDLINES FOR
INSTALLING A PORTER WALL–MOUNTED BACKSTOP
8. Secure two hinge angles (back-to-back) for each chain support on a Model 312 (stationary) unit and a
Model 219 (up-folding) unit. Secure with four (4) 3/8” X 2 1/4” Grade 5 (min.) carriage bolts, lockwash-
ers and nuts. For a Model 220 (side-folding) unit, long and short hinge weldments are provided with
swivel shackles. Determine the direction of fold-first before mounting the wood pad to the wall. The
long hinge will be furthest from the folded unit.
Installation Tip: On folding units, the placement of the long and short hinge plates is critical. The
folding operation is based on a collapsing parallelogram shape. Should the hinge plates be off
as little as 1”, the unit will not fold properly. Be certain the wall is straight, and shim as neces-
sary. The telescoping adjustments on the extension tubes will allow you to plumb the bank, but
will not help in adjusting pivot points due to a wall camber or poor hinge plate placement.
9. Mount the wood pad with hinge angle supports as detailed, and secure with ½” diameter Grade 5 bolts,
flatwashers, lockwashers, and, in the case of the thru-bolt locations, nuts. Cut off excess threaded rod
at thru-bolt locations, as required.
10. Secure the 5/16” repair link at each double hinge angle location (or swivel hinge plate), and attach the
3/16” proof coil chain. Crimp the repair link closed.
11. Now mount the wood pads with the hinge angles spaced properly to accept the 1 7/8” OD tubing (or, in
the case of folding units, the hinge plate weldments). Repeat Steps 8 & 9 for attachment methodology.
Important: Verify the distance of the hinge angles above the finished floor to assure proper goal height.
12. On stationary backstops, attach the top extension pipes to the hinge angle brackets, utilizing a ½” x 2-
3/4” Lg. Grade 5 hex head cap screw. Secure with a ½” lockwasher and hex nut. On folding backstops,
attach the top extension pipes to the hinge plate weldment, utilizing a ½” x 3” Lg. Grade 5 hex head cap
screw, and secure with a Grade C convex locknut. On Model No. 219 and No. 220 units, a 1-5/8” OD
telescoping attachment is first secured to the wall bracket.
Installation Tip: Be careful to separate the 1-5/8” half-clamps from the 1-7/8” half- clamps uti-
lized to securing chain or flats to the extension pipes.
13. Referring to the installation print, the chain will terminate at either the 1-7/8 OD telescoping tube, or the
shorter 1-5/8” OD telescoping tube, dependent upon the backstop model you have. Sleeve the telescop-
ing portion on, and place the half-clamp assembly near the end of the extension. Swing the assembly to
horizontal (90° from the wall), and secure the chain to the half clamp assembly. There is a setscrew to
aid in holding the proper extension from the wall.
Do not
secure with a rivet, or cut excess chain at this
point! Tighten the half-clamp securely. You may have to readjust this clamp later, but this connection
must be secure to support the backboard. See Detail “E”.
Содержание 219 Series
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