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Western Safety Products, Inc. 505 South Lander St., Seattle, WA 98134
Toll Free: (888) 823-0808 Phone: (206) 264-0808 Fax: (206) 264-4921
Website: http://www.westernsafety.com sales@westernsafety.com

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Bumping Posts


Western-Cullen-Hayes Bumping Posts Feature:

  • Exclusive "H" beam compression members for unmatched strength
  • Special designs for every application
  • Easy to install
  • Noon site assembly
  • Long life, with minimum maintenance
  • Proven - effective design
  • Modern Design Rugged All Steel

Hayco® Shock-Free® Cushion Head. Use the Hayco® Shock-Free® Cushion Head to:

  • Extend the life of a Bumping Post.
  • Reduce damage claims to equipment.

Clamp bolt design, installs quickly and easily. Applies to a variety of commercially produced bumpers. Use Hayco® attaching fixture for mounting Shock Free® Head to flat vertical surfaces.

Facts about ”Hayes® “ bumping posts

Western-Cullen-Hayes Bumping Posts are designed to stop unauthorized movement of a railroad car beyond the rail end and to protect property, personnel, lading and equipment from damage. They also improve operating efficiencies by providing a positive stop against which train crews can switch while operating under standard procedure. The bumping posts, when properly installed at track ends, engage the coupler and draft gear of a moving car and transfer the force of impact to ties, rail and ballast, bringing the car to a safe, sure stop. They are designed to accommodate normal switching speed.
Bumping posts are especially valuable in areas needing extra protection such as chemical storage areas, work yards, assembly lines, plant loading and unloading areas, etc.
Theory of Design
Rugged, All-Steel Construction
Designed Like A Bridge: Post Head And Members Transfer Impact From Coupler To The Ballast
Engineered For Easy Installation
The W-C-H design employs two triangular units to make a complete post. A one-piece front (tension) unit (Figure 1) and one-piece rear (compression) unit (Figure 2) are combined to absorb and carry the stresses of the coupler impact to the track. Each unit has a strong angle cross member below the rails
which helps prevent distortion of the post and track.
How it works:
When a coupler strikes the Bumping Post the impact is taken in three directions: (See Figure 3)

  1. Horizontal thrust along the track
  2. Upward push at the front
  3. Downward load at the rear

In all W-C-H Posts the horizontal thrust is carried to the track rails by alloy steel bolts having double the strength of ordinary bolts. There is a W-C-H Bumping Post to meet most every requirement. Use the convenient chart to determine the type best suited to your particular needs. A point to remember is that a bumping post is no stronger than the track on which it is mounted. For maximum track end security, proper installation is a must. Be sure to read the pertinent section of this brochure. Western-Cullen-Hayes Bumping Posts are established as world-wide standards. A rating earned by superior design and quality of workmanship. The following sections of this brochure detail both Hayes® and Buda bumping posts, now all part of the Western-Cullen- Hayes family of renowned, reliable track appliances.


Bumping Post Components


Bumping Posts - Types and Designs


Bumping Post Anatomy


Design Parameters
Components have been carefully selected to provide maximum strength at minimum weight. Posts are listed in order of strength rating. Generally speaking, Western-Cullen-Hayes Bumping Posts are designed to accommodate normal switching speeds.



Weight In

Tension Units

Compression Units



In Inches Area- Sq. Inches Steel Symbol

Least I*



2 dia.


C10 25 lb.




2 dia.


C10 25 lb.






W6 20 lb.






W6 25 lb.






W6 25 lb.




1-1/2 x 4


W8 31 lb.




1-1/2 x 4


W8 31 lb.




1-1/2 x 6


W8 40 lb.




1-1/2 x 6


W8 40 lb.


*NOTE: "Least I" refers to resistance to compression or bending. The full term is "Least Moment of Inertia". It is the most accurate way to determine bumping post strength.

How to select the bumping posts you need
Using the chart below, and the Design Parameters chart on the chart above, choose the type bumping post that matches your application requirements and conditions.
Bumping posts can be made to meet special situations. Designs are available for all components above rail base. Special requirements for steel mill and mining cars, a typical rail heights wide and narrow gauges and unique track configurations are also available. *
* Consult factory for information
** Not provided with bumping post; (use locally available relay rail).

Type Bumping Post Application
WK Recommended for industry stub end track with three car capacity or less, without descending grades to track end.
WD 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.
WDC Same as WD but with a curved striking face for passenger car couplers.
WG For active track, where frequent striking face contact demands greater car stopping ability. Also, for active track within buildings; metropolitan, flat switching yards and TOFC track-ends. Installation-strengthening" middle rails"** can be used with this post.
WGC Same as WG but with a curved striking face for passenger car couplers.
WA The strongest post ever built as a standard product. For track-end service where greatest car-stopping ability is needed. Lay track with heaviest rail available, full-spike ties, use plenty of good ballast and tamp thoroughly. Installation- strengthening" middle rails"** can be used with this post.
WAC Same as WA but with a curved striking face for passenger car couplers.
WCT General service post. Clamp to rail design. No holes to drill in rail.
WCTS Same as WCT but with spring-loaded striking face and anti-climb ribs. For use in rapid transit service.
WP* Portable one-piece cushion post.
WR Special design post-heavy service for special gauge and cars. Standard or modified gauge.

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.
NOTE: All bumping posts are sold without the HAYCO ® SHOCK- FREE® CUSHION HEAD. If you are interested in this addition see tables below for further information. The SHOCK-FREE® HEAD slips on the contact face and assists in prolonging the life of the bumping post, providing additional cushioning and reducing lading damage.

General Dimensions for Bumping Posts

General dimensions for the bumping posts you order
You know which types of bumping posts you need. The next step is to determine the dimensions and other requirements for installation. The following drawings will give you the data you need.
Please note that all bumping post heads except on the Type WCTS and WCT are buil t 2-112 inches to the right of centerline of track. This accommodates standard car coupler position.


Bumping Post Dimensions


Installing Bumping Posts

Bumping Post Installation


Installing W-C-H " Hayes" Bumping Posts

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 fully-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 above.
The Shock-Free ® Head option (shown at right) will extend the life of any bumping post installation. It is described in detail in a following section.

Experience insures dependability. For maximum dependability, Western-Cullen-Hayes recommends that all bumping post installations be made by experienced trackmen. Where industries are concerned, local railroad contractors or the serving railroad have experienced personnel who can provide competent, reliable guidance and installation.

Special Bumping Posts
Western-Cullen-Hayes produces a wide variety of special use stopping devices.

  • Hydraulic units with over 1,000,000 ft. lbs. capacity for high demand locations.
  • Two-way bumpers for limiting movement from two directons.
  • Special rolling equipment or moving material such as Cranes, Transfer Cars - ingots.
  • Hinged units for fast clearance, both manual and powered, to allow through movement of equipment.

Hyco Shock-Free Head for Bumping Posts

Hayco® Shock-Free® Head prolongs bumping post life - cuts equipment damage and protects lading

The W-C-H Hayco® Shock-Free® Head (U.S. Patent No. 2,860,582) pays for itself at every installation by prolonging bumping post life, cutting equipment damage at track-ends, and doing its share to decrease claims. This rugged unit takes only about thirty minutes to install, but it can mean the difference between a troublesome and trouble-free track-end. Thousands are proving it every day, around the world. Our 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 provided. 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.
The 12-1/2" extension of the bumping post provided by the Shock-Free® Head, provides ample air hose clearance for Piggy-Back cars and Buck Unloaders.

Bumping Post Shocks



435 lbs

Striking Face

15" x 17"

Extension, Open


Extension, Closed



80,000 lb


8, nested in twos

Shock Pads

8, each 5/8" thick

Ordering Reference

Hayco® Shock-Free® Head


Shock-Free Head



Attaching Fixture gives added dimension to Hayco® Shock-Free® Head

There is no substitute for a properly designed steel bumping post at a track end. Expensive concrete posts shift and crack. Wooden ramps quickly become deformed under impact. Retaining walls are usually too light to function as a car stop. However, if conditions do not permit the use of a steel bumping post, the Shock-Free Head can be mounted on a flat vertical surface. Consult local civil engineer regarding capacity of the vertical surface you intend to use.
The W-C-H Attaching Fixture, a 145 pound steel weldment, is first secured to the vertical surface with bolts or lag screws. (Please refer to drawing, above right, showing bolt hole spacing.) The Shock - Free® Head is then slipped onto the Fixture and the cap screws tightened. In this application, the Shock- Free® Head permits car couplers to come within 19-1/4" of the end of track.


145 lb


3/4" hot rolled steel



Extension with Head Mounted


Back Plate

16" x 18"

Ordering Reference

W-C-H Attaching Fixture

Special Application - WR Bumping Post with Hayco® Shock-Free® Cushion Head (Optional).
This special design bumper can be made to accommodate track gauges from 36" to standard (4' 8-1/2"). A variety of contact surface heights are available. The "Model WR" Bumping Post has been used for special application in mining and steel mills.

Special Bumping Posts


Hydraulic Bumping Post Diagram



Special Bumping Posts

Most manufacturers would like to make only standard products. Western-Cullen-Hayes is no exception. However, regardless of how standardized an industry is, there are always unusual problems that need solutions. Railroad track-end protection is no exception. Because Western-Cullen-Hayes has dealt with side track security since 1903, and because we are the recognized leader in the field, we have been requested to address a wide range of unusual Bumping Post problems. In the process of successfully meeting these needs, we have acquired a level of experience and engineering knowledge second to none. Displayed on these tables are ten different Bumping Posts we have manufactured in response to customer requests for special application products.

The accompanying captions explain the problems solved by Western-Cullen-Hayes know-how. Whether your need can be met by one of our standard Bumping Posts or requires the use of our extensive background to develop a design that accommodates unique circumstances, Western-Cullen-Hayes is at your service. We invite your further inquiry by email or call (206) 264-0808.



Special Bumping Posts

Left column, top: Two-faced bumping post
Left column, bottom; Energy transfer bumping post
Center column: Single rail spring loaded bumping post
Right column: Below-grade installation bumping post (pre-installation)



One railroad served the North end of the plant, another railroad the South end. Both railroads used the same track. How do you keep the cars separate and also stop them? There was not enough room to use twenty feet of track space for back-to-back, conventional bumpers. Solution: A two-faced Bumping Post requiring only two and one-half feet of track space.

W-C-H recognized many years ago that a cushioning effect was achieved if a railroad car-stopping device was allowed to dissipate car momentum by shoving ties and ballast. Transferring impact into the ties and ballast reduces damage to lading, car, rail and bumper. Our Type WP Bumping Post, pictured here, employs this principle and has been in use since the late 1950's.

Single-rail, spring-loaded Bumping Post originally designed to stop a coal stacker-reclaimer traveling at low speeds. The stacker-reclaimer weighs approximately two million pounds.

The building was not long enough to accommodate railroad cars and a Bumping Post, too. To solve this problem, we designed a unit with a below-ground super-structure and an extended face. Installed outside, stability is provided by the below-ground portion ofthe Bumping Post and the extended face reaches through the wall to contact railroad car couplers.



Special Bumping Posts

Above, top left: Transit car bumping post
Above, top right: Auto unloading bumping post
Above, middle left: Steel mill bumping post
Above, middle right: Nuclear plant bumping post
Above, bottom left: Crane bumping post
Above, bottom right: Transit system bumping post (Italy)



Transit cars pose special problems. Structural strength, coupling mechanisms, appurtenances and car-end configuration are varied and usually quite unlike freight car design. This transit car Bumping Post has an extra-length, spring-loaded face that will clear car equipment. The face is also equipped with
anti-climber ribs to help prevent the car from riding up if the bumper is hit too hard.

Designed in 1939 for use in steel mills. Accommodates special gauge, special height, high tonnage cars. This bumper is still used for this application and similar ones in other industries.

Cranes and other devices that use rails to guide and facilitate movement don't always have coupler-level areas for contact points. This giant Bumping Post was designed for a non-railroad application, in response to a request from an engineering firm.

An auto unloading facility required a Bumping Post with special strength and clearances. A provision for securing the bumper to a "dead man" ahead and under the track helps to reduce stress on the running rails when railroad cars impact the Bumping Post.

Also, the special shape ofthe striking face allows clearance for the oil pans of automobiles being loaded on the lower deck of the railroad cars.

A nuclear power plant is served by 500,000 pound fuel rod cars. Loading and unloading occurs inside. This special multi-spring bumper was designed to dissipate the momentum of slow moving cars and prevent structural damage to the reactor.

We have been building transit system Bumping Posts since 1934 for customers the world over. This unit was designed with a special face and spring cushioning for the Milan, Italy, Transit System.



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