2.2
DETENTION HOLLOW METAL DOORS AND FRAMES
2.2.1
Door Fabrication
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NOTE: Refer to architectural door schedule on
drawing for all pertinent information about doors,
door frames, and security hardware set numbers.
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a.
Provide doors fabricated of cold rolled, pickled and oiled
stretcher leveled steel sheets with clean smooth surfaces. Gages
shall be as indicated for each type of door. Form molded members
straight with joints coped or mitered, and in true alignment.
Welded joints on exposed surfaces shall be dressed smooth, to be
invisible. Doors shall be custom made full flush design,
internally reinforced, sound deadened and insulated, 50 mm 2 inches
thick to receive detention locks, of the elevations, types and
sizes shown on the approved shop drawings and schedules.
b.
Face sheets shall be mild steel fully welded on edges with
continuous inner-reinforcements full height and width. Provide
internally 10 gage steel channel banding around complete door
perimeter, spot welded to face sheet 75 mm 3 inches on center.
Inner reinforcements shall be truss design with triangular form,
or interlocking channels with "Z" bar stiffeners, the shape of
which cannot be altered without changing the length of the sides.
Flat apexes shall be resistance spot welded on 70 mm 2 3/4 inches
centers horizontally and 75 mm 3 inchescenters vertically.
Insulate each flute of reinforcement with 96 kg/cubic meter 6 pound
density rock wool.
c.
Bevel vertical door edges 3 mm in 50 mm 1/8 inch in 2 inches and
internally reinforced full length with 3 mm 1/8 inch thick steel
channels spot welded not over 75 mm 3 inches on center inside both
door faces. Close top and bottom door edges with continuous
recessed 10 gage channels extending the full width of the door and
welded 75 mm 3 inches on center maximum to both faces and
continuously welded to the vertical door edge channels to form a
single perimeter frame inside the door. Top and bottom edges of
doors shall be finished flush, except for provisions for
weatherproofing. Mortise, reinforce, drill and tap door edges to
receive templated specified hardware in accordance with the
approved hardware schedule and the hardware manufacturer's
recommendations for the proper installation of hardware and
detention equipment.
d.
Clearances shall be coordinated with frame and in accordance with
NAAMM HMMA 863, Part 2, Section 2.02.
e.
Doors shall be free from warpage, wind or buckle.
Bends shall be
of minimum radius for the gage of metal used.
f.
The removable glass stop shall consist of 10 gage angle securely
fastened to the frame using machine screws (6 mm1/4 inch #20UNRC:
25 mm at 150 mm one inch at 6 inches on center and no more than
100 mm 4 inches from corners). Exposed screw heads shall be
button head type, and shall be torx fitting tamperproof. The
SECTION 11193
Page 6
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