Bumping Posts

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BUMPING POSTS Head – readily accepts impact of coupler and transmits it to tension and compression members. Tension Members – impact tends to pull rails upward and toward each other. Cross Track Spacer – holds track to gage at tension end (front). Compression Members – Resists forward and down forces from the head and tension members, providing direct path for energy travel to ballast. Cross Track Tie Bar – Prevents rail spreading at compression end (rear). TYPE BUMPING POST WK WD APPLICATION Recommended for industry stub end tracks with three car capacity or less, without descending grades to track end. Weight – 705 lbs. General service. Long industrial tracks outside of buildings, flat switching yards, no descending grades or hazards at track end. Installation-strengthening “middle rails” can be used with this post. Weight – 800 lbs. For active track, where frequent striking face contact demands greater car stopping ability; any spur downgrade towards post; within buildings; metropolitan flat switching yards and TOFC track-ends. Installation-strengthening “middle rails” can be used with this post. Weight – 1250 lbs. The strongest post ever built as a standard product. For track-end service where greatest car-stopping ability is needed. Lay track with the heaviest rail available, use full-spike ties and plenty of good ballast, and tamp thoroughly. Installationstrengthening “middle rails” can be used with this post. Weight – 1655 lbs. All standard Bumping Posts are made in one size which will fit any rail from 5 to 7-1/2 inches high (except Type WA which fits any rail from 5-3/8 to 8 inches high). For rail smaller than 5 inches or larger than 7-1/2, inches please give height of rail. WG WA IV – 12 (503) 286-3691 FAX (503) 286-2097 © 2007 www.HarmerSteel.com sales@harmersteel.com
BUMPING POSTS The Shock-Free Head pays for itself at every installation by prolonging bumper post life, cutting equipment damage at trackends, and doing its share to decrease Loss & Damage claims. This rugged unit takes about thirty minutes to install, but can mean the difference between a troublesome and trouble-free track-end. Thousands are proving it every day around the world. The Shock-Free Head is a 435 pound cushioning unit which is applied to a railroad bumping post after it is in track. It slips over the regular bumping post head and is made a part of the post by tightening the six cap screws that come with it. Train impact is absorbed by compressing eight heavy springs which “float” between laminated rubber and fiber shock pads. As the head compresses 1-5/8” from first coupler contact, the draft gear mechanism in the car comes into operation. At normal switching speed, the result is a shock-free final impact, protecting the bumping post, the car and the lading. Middle Rail Specific installation instructions are included with each unit. However, time and experience have established several measures that must be taken to insure a maximum service life from your bumping post investment. Much of the car-stopping effectiveness of any bumping post depends upon the track to which it is secured. This is the post’s “foundation” and it should be as adequate to the job as the foundation for any other type of structure. Generally, the heavier the rail, the better the foundation. Use sound ties, fully spiked, and full-bolted rail joints ahead of the post. Be sure you have good, well-tamped ballast. A special feature (rail clips on rear crossmember) furnished with types WD, WG and WA Bumping Posts allows the use of “middle rails.” These “helper” rails are supplied by the customer and should be spiked between the running rails to increase track strength. Two pieces of heavy rail not less than 18 feet long should be used. These pieces of rail should extend about three feet beyond the post toward the rear and should be spiked for their entire length. A drawing displaying a typical installation with “middle rails” is shown at left. Cross Angle Cross Angle Right H Beam Left H Beam www.HarmerSteel.com sales@harmersteel.com © 2007 (503) 286-3691 FAX (503) 286-2097 IV – 13