2.2.1.1
Materials
Aluminum railings shall be of pipe or tube as specified in paragraph PIPES
AND TUBES. Steel railings shall be of steel as specified in paragraph
PIPE. Sleeves and other appurtenances shall be of the same material as the
rails and posts or approved compatible materials.
2.2.1.2
Fabrication
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NOTE: Flush-finished joints should be specified for
railings when a good appearance is desired.
NOTE: 90 kg (200 lb) is the recommended minimum
design working load for welded assembly railings
fabricated of 38 mm (1-1/2 inch) nominal size,
standard weight pipe with posts spaced 2.5 m (8
feet) on centers. Other loads may be specified for
railings when they are designed to resist greater
loads.
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Rigid joints in railings shall be of welded, threaded, or slip-on fittings
assembly [and shall be flush-finished]. Welded joints shall be reinforced
with tight-fitting interior sleeves and shall be assembled by welding rails
and posts to flush-type fittings, or by mitering and welding joining rails
and posts. Assembled threaded joints shall have no exposed threads.
Slip-on fittings shall be tight-fitting. Fasteners for slip-on fittings
shall be the self-locking, concealed type. Fasteners for aluminum fittings
shall be of aluminum or stainless steel. Fasteners for steel fittings
shall be of stainless steel. Expansion joints in railings shall be an
[inner-sleeved] [outer-sleeved] [outer-sleeved or inner-sleeved]
slip-joint, with one end of the sleeve secured to one rail and the ends of
the adjoining rails separated a minimum of 25 mm 1 inch in the installed
position. Expansion joints shall be located in rails near the intersection
of rails and posts Bends in railings shall be made in a manner that
railings are not crushed and shall maintain their original cross-sectional
shape. Welds shall be ground smooth. Railings shall be free of burrs,
sharp corners, and sharp edges. For railings of other than welded
assembly, manufacturer design calculations, showing that the installed
railings are capable of withstanding a design working load of [90] [_____]
kg [200] [_____] pounds applied in any direction at any point on the top
rail without permanent deformation, must be submitted and approved prior to
installation.
2.2.1.3
Installation
Railings shall be installed as specified and shown. Railing posts anchored
to concrete surfaces perpendicular to the posts shall be [set in sleeve
inserts anchored in the concrete, and the space between posts and sleeves
shall be filled with molten lead, sulphur, or a quick-setting hydraulic
cement and covered with standard collar fittings secured to the posts. A 6
mm 1/4 inch drain hole shall be drilled near the bottom of each post.]
[rigidly secured to flange fittings anchored to concrete with expansion
anchors.] Railing posts anchored to concrete surfaces parallel to the
posts shall [have the sides of posts continuously welded to base plates]
[be rigidly secured to flange fittings] anchored to concrete with expansion
anchors. Railing posts anchored to structural metal shall be [welded to
SECTION 05502A
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