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Rail Transfer Bridges

Why Use Rail Transfer Bridges

Rail-Transfer-Bridges The primary use of rail transfer bridges is to span from floor to floor or dock to dock over railroad tracks. The platforms are left in the horizontal position most of the time and then elevated to the vertical position when trains need to pass on the railroad spur. In the most common application there is a single loading dock bridge recessed in the face of one floor or dock and when the bridge is lowered, the traveling end of the platform rests in a recess on the opposing dock. Sometimes due to overhead clearance problems or very long spans, two loading dock bridges are positioned end to end, each hinged on opposing docks so that their traveling ends meet in the middle of the span. In these instances, the traveling ends of the rail transfer bridges are either supported by a concrete pier or each bridge leaf is equipped with automatic folding legs.

Note that if a unit is specified that is wide enough for two way traffic, then the bridge capacity specified must exceed the combined weight of the passing traffic and the axle capacity rating must exceed the combined maximum axle weight of the two (2) passing vehicles. Sometimes it is more economical to install two (2) narrower units; each limited to one way traffic.

Call us at 1-800-843-3625 with any questions you have about our loading dock bridges.

ARCHITECTURAL SPECIFICATIONS FOR RAIL TRANSFER BRIDGES

SCOPE: This specification covers Advance Lifts, Inc. Rail Transfer Bridge model number “ A ”.

Platform: The bridge deck shall be “ B ” wide x “ D ” minus 2-1/2″ long. The clear span between docks is “ C ”. (Actual platform length is clear span plus 24″ for the ram cutout, plus 6″ for lip cutout, less 1″ clearance at the lip end and 1-1/2″ at the ram end.) The bridge shall have a safety tread steel deck and be fabricated from structural steel shapes and forms, which are rigidly welded and reinforced for maximum stability and minimum deflection.

Capacity: The bridge shall have a loading capacity of “ E ” with an axle capacity of “ F ” at a traffic speed of 3 mph.

Travel: The bridge travel shall be a full 90º arc so that none of the bridge mechanism projects beyond the dock when fully raised.

Rams: The bridge shall be equipped with “ G ” heavy duty double acting hydraulic rams which have chrome plated rods to inhibit rusting. The rams shall also be equipped with steel internal cylinder stops and ceramic wear rings for long life and velocity fuses.

Eletrical Control: The bridge shall be equipped with two (2) NEMA 1 “deadman” style wall mounted pushbutton control stations (one for each dock) and a UL approved controller assembly consisting of a NEMA 12 control box, magnetic motor starter and a 24 V. control transformer with fused secondary and primary.

Power Unit: The electrical power unit shall be self-contained with all components built onto a single oil reservoir. It shall consist of a continuous duty 5HP 230/460V-60HZ-3PH motor, high pressure pump, counter balance valve, oil filters and mild steel reservoir. The overall dimensions shall be approximately 22″ x 20″ x 21″ H.

Speed: The bridge shall raise in “ I ” seconds.

Work to be performed by owner: All electrical work, excavation, concrete work, building modifications, pit angle framing, underground piping and embedded items.

Work to be performed by Installer: Furnish the hydraulic oil and install the bridge complete less the above exceptions.

Specification Table for Rail Transfer Bridges

AModel No.14-10114-10214-10314-10414-10514-10614-10714-10814-10914-11014-11114-11214-113
BWidth6′6′6′6′6′6′6′6′6′6′6′6′6′
CClear Span at Docks14′15′16′17′18′14′15′16′17′18′14′15′16′
DOverall span*16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′
ECapacity10000100001000010000100001500015000150001500015000200002000020000
FAxle Capacity800080008000800080001200012000120001200012000160001600016000
GRams1122211222222
HWeight3800400045004700490042004400440050005200480052005500
AModel No.14-11414-11514-11614-11714-11814-11914-12014-12114-12214-12314-12414-125
BWidth6′6′6′6′6′6′6′6′6′6′6′6′
CClear Span at Docks17′18′14′15′16′17′18′14′15′16′17′18′
DOverall span*19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′
ECapacity200002000025000250002500025000250003000030000300003000030000
FAxle Capacity160001600020000200002000020000200002400024000240002400024000
GRams222222222222
HWeight570059005000530055005800610052005500580061006400
AModel No.14-20114-20214-20314-20414-20514-20614-20714-20814-20914-21014-21114-21214-213
BWidth7′7′7′7′7′7′7′7′7′7′7′7′7′
CClear Span at Docks14′15′16′17′18′14′15′16′17′18′14′15′16′
DOverall span*16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′
ECapacity10000100001000010000100001500015000150001500015000200002000020000
FAxle Capacity800080008000800080001200012000120001200012000160001600016000
GRams2223322233222
HWeight4800500053005700600052005400570062006500590061006500
AModel No.14-21414-21514-21614-21714-21814-21914-22014-22114-22214-22314-22414-225
BWidth7′7′7′7′7′7′7′7′7′7′7′7′
CClear Span at Docks17′18′14′15′16′17′18′14′15′16′17′18′
DOverall span*19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′
ECapacity20002000025000250002500025000250003000030000300003000030000
FAxle Capacity160001600020000200002000020000200002400024000240002400024000
GRams332223322233
HWeight700073006200640068007300760065006700710076007900
AModel No.14-30114-30214-30314-30414-30514-30614-30714-30814-30914-31014-31114-31214-313
BWidth8′8′8′8′8′8′8′8′8′8′8′8′8′
CClear Span at Docks14′15′16′17′18′14′15′16′17′18′14′15′16′
DOverall span*16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′
ECapacity10000100001000010000100001500015000150001500015000200002000020000
FAxle Capacity800080008000800080001200012000120001200012000160001600016000
GRams2223322233222
HWeight510054005700610064005500580061006600690060065006900
AModel No.14-31414-31514-31614-31714-31814-31914-32014-32114-32214-32314-32414-325
BWidth8′8′8′8′8′8′8′8′8′8′8′8′
CClear Span at Docks17′18′14′15′16′17′18′14′15′16′17′18′
DOverall span*19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′16-1/2′17-1/2′18-1/2′19-1/2′20-1/2′
ECapacity200002000025000250002500025000250003000030000300003000030000
FAxle Capacity160001600020000200002000020000200002400024000240002400024000
GRams332223322233
HWeight740077006500680072007700800068007100750080008300

NOTE:

“I” Speed – 1 ram=60 sec., 2 rams=120 sec., 3 rams=180 sec.

* Actual platform length is “D” (overall span length) minus 2-1/2″.

Please note that we have made bridges up to 100,000 lb. capacity. If you do not see what you need, simply consult the factory

Rail Transfer Bridges Drawings

Rail Transfer Bridges

1-800-843-3625

LOWER COST DUE TO LONGER LIFE

701 S. Kirk Road • St. Charles, IL 60174 • Toll Free 1-800-843-3625 • Fax: 630-584-9405
© Copyright 2021 Advance Lifts, Inc.

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