The Test...

The Federal Outdoor Impact Laboratory (FOIL) Tested the PFI 200-1 Coupler* on April 30, 1987 at 20 mph, and again on May 01, 1987 at 60 mph. The couplers were mounted under a 523 lb. aluminum pole measuring 53'-2" in height. A reusable bogie weighing 1850 lbs. was crashed into the installation at 20.7 mph and 61.2 mph. The reported change in velocity for these tests were 11.2 ft/sec and 8.8 ft/sec. Calculated changes in velocity of a theoretical occupant were 12.4 ft/sec and 10.3 ft/sec respectively. (The 1998 AASHTO specification requires a maximum velocity change for an 1800 lb. vehicle of 16 ft/sec.)

Of importance is the absence of any projection on the foundation - only anchor bolts remained. The stub height requirement of 4" is easily met.

The Result...

Fatigue: Cyclic test loads of +6.5 Kips to +12 Kips and -2.7 Kips to +7.5 Kips for 2 million cycles had no adverse affect on the PFI 200-1 coupler*, Subsequent destructive tensile test average 30,000 lbs. (29,420 min. for 5 tests).

One test was carried to a 4 million cycles (-2.7 Kips to +7.5 Kips) without failure and tensile tested, breaking at 30,570 lbs. Clearly the PFI 200-1 coupler* was superior to the PFI 100-1 design per the requirements of the 1998 AASHTO specifications.

Stress Corrosion: Similarly, both couplers were subjected to a stress corrosion test for 1000 hrs in accordance with ASTM B117-85 specifications. No evidence of stress corrosion, pitting or general corrosive degradation was observed.

These above tests substantiate a long life expectancy while providing maximum safety virtually maintenance-free.

*The 200-1 coupler was modified slightly to improve compression strength and is designated 200-1A. The device continues to meet or exceed the 1998 AASHTO specifications substantiated by additional fatigue and production control tests.

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