3.2.3
Bolted Rail Joints
**************************************************************************
NOTE: Welded rail joints are preferred for crane
rail except at connections between rail and rail
fittings such as switches and frogs where bolted
joints are recommended. The project drawings shall
indicate each joint type (bolted and/or welded).
Welded connections between carbon steel rail and
rail fittings fabricated from carbon steel, if
desired, may be accomplished using either of the
methods identified in paragraph "Welded Crane Rail
Joints." The designer shall determine the welding
method(s) to be used and project drawings shall show
location of each welding method. Welded connections
between carbon steel rail and cast manganese steel
are not recommended. However, if the activity
requires a dissimilar metal welded connection such
as this, the cast manganese stub rail end section
should be prepared for welding in accordance with
Sketch 14606-1. The manual shielded arc welding
method in accordance with paragraph "Manual
Shielded-Arc Welding Method" and electrodes in
accordance with paragraph "Electrodes" should be
used. Thermite method is not acceptable for welding
dissimilar metal.
**************************************************************************
[Provide bolted joints at rail connectors.] [Provide bolted rail joints to
connect crane rail to crane rail fittings.] Bolted joints will be
permitted for connection of crane rail fittings to intersecting railroad
rail not for use by cranes. Chamfer rail head at joints in accordance with
AREMA Manual.
3.2.3.1
Joint Bars
Install joint bars with the full number of bolts, nuts and washers. After
track has been tested as provided for herein and before flangeway concrete
is poured, check and tighten bolts. The openings between railheads shall
not deviate more than 3 mm (1/8 inch) 1/8 inch from the opening recommended
for a given temperature. Vertical or horizontal mismatch at joints shall
not exceed 2 mm (1/16 inch) 1/16 inch. Joints shall conform to applicable
AREMA Manual. Tighten joint bar bolts to a tension no less than the proof
load given in ASTM A 183. Perfrom tightening with a properly calibrated
wrench[ or by turn of the nut method].
3.2.3.2
Compromise Joints
Provide bolted [and welded] compromise joints for connection of adjoining
rails or fittings of differing cross sections. Joints shall be by means of
either cast or fabricated compromise bars or welded transition rails.
Provide step chairs, as required, at joints of rails of differing height.
Provide compromise joints with proper allowance for rail wear. The offset
of compromise joints or of either surface or gage alignment shall not exceed
3 mm (1/8 inch) 1/8 inch. Rails at compromise joints of rails for
double-flanged wheels shall have the centerlines of the rails in alignment
and shall provide a smooth surface along the top of rails. Grind edges of
the wider of the two rail heads smooth over a minimum transition length of
450 mm (18 inches) 18 inches. Heat area to be ground to at least 290
SECTION 14606N
Page 25
Previous Page
