SECTION B - Derry City Council

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solution for the foundations of posts linked to the Contractor Designed Retaining
Walls. Posts at 1.0m centres.
Straining posts: Posts as above, but complete with a 6 Nr double sets of
circular receiving lugs welded to each post to receive 6 Nr 20mm diameter
horizontals each side. Straining Posts set in an additional concrete foundation of
550 x 550 x 610 mm deep mass concrete surround. Posts at 4.0m centres.
End Posts: As above with only 6 Nr single circular receiving lugs as shown on
the drawings
Horizontal Rails: 6 Nr 20 mm diameter solid galvanised mild steel rails.
Method of setting posts: In concrete as described above and as shown on the
drawings or as Contractor Designed i.e. set in concrete pipe work set in
concrete as the retaining wall is constructed to accommodate posts after site
measurements.
Other requirements: No sharp edges on either posts or rails. Rails to be parallel
to ground level and not stepped. Allow for all radii and curves on site.
300 OAK LEAFED DOUBLE GATES
o 2.05m high x 3.2m wide mild steel Double Gates
o Manufacturer: To be approved
o Drawing Reference: 83473-05
o Size: 2.05m high x 3.0m wide clear opening.
o Vertical Bars: 16 x 16mm square vertical bars at 100mm spacing (116mm
centres); bottom section of gate to have intermediate vertical bars at100mm
spacing (116mm centres); all vertical bars to be welded to horizontal members
at all points.
o Gate Frame: 50 x 50mm solid bars adjacent to gate posts with rounded profile
at hinge point and at bottom to bear down on 50mm diameter stainless steel ball
bearing; 50 x 12mm flat bar framing top, bottom and opening side. Top member
to be bowed as indicated. Two horizontal members, each 25mm diameter,
spaced 100mm apart as indicated. Hinge point and gate pivot arrangements to
be as indicated.
o Posts: 100 x 100 x 4 x 2750mm long RHS mild steel gate post c/w capping
piece and 200 x 200 x 6mm base plate; posts to have a 150 x 75 x 10mm thick
m.s. plate welded to accommodate strap hinge arrangement and detail as
indicated.
o Method of setting posts: Base plate bolted to pier foundation using M8
expanding bolts in 4 Nr. positions.
o Finish: Galvanised to BS EN ISO 1461:1999 and polyester powder coated to
BS6497. Colour Black RAL: 9005.
o Special Oak leaf motifs to top of each folding gate to be Oak Leaf shaped solid
6mm galvanised plate welded to frame at each Oak Leaf touching frame. To be
primed and painted with haemarite exterior paint 2Nr finished coats ‘Gold’.
Colour to be agreed with colour chart to CA prior to painting
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