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a.

One pane of 5/16” leaded shielding glass.

b.

Two panes of 5/16” leaded shielding glass.

c.

One pane of 9/16” lead shielding glass.

d.

[custom size]

5.

Provide frames with voice transmission slots.

2.14

LEAD-LINED SOLID CORE WOOD DOORS

A.

Flush veneered construction using single layer of sheet lead in center of door.  Laminate wood cores under hydraulic pressure on each side of lead.

1.

Extend sheet lead lining to door edges providing X-Ray absorption equal to partition in which door occurs.

2.

Shield cutouts for lock sets with sheet lead lapping, lead lining of lock sets or door lining, of equal thickness lead as used in door of same opening.

3.

Further bond cores with 6 poured lead dowels at the following locations:

a.

2 at 8 inches (203 mm) from top and 4 inches (102 mm) sides, 2 at center 4 inches from sides, and 2 at 8 inches (203 mm) from bottom and 4 inches (102 mm) sides.

4.

Edge Strips:  Minimum thickness of 2 inches (51 mm) each edges of door.

a.

Species:  Same as wood face veneer.

b.

Glue strips to cores before face veneer is applied.

c.

Extend vertical edge strips full height of door and bevel 1/8 inch (3 mm) for each 2 inches (51 mm) of door thickness.

5.

Face Veneer for Transparent Finish:  [Plain-Sliced Red Oak], [Rotary-Cut Red Oak], [Rotary-Cut Birch], [Rift-Cut White Oak] [“custom” veneer]

6.

Opaque Finish:  [Medium-density overlay] [Any closed-grain hardwood of mill option].

7.

Secure glass with hardwood stops of same species as face veneer.  Secure frame to door with wood screws.

2.15

LEAD-LINED HOLLOW METAL DOOR FRAMES

A.

Lead-Lined Hollow Metal Door Frames:

1.

Construction:  Line inside of frames with single unpierced strip of sheet lead of not less than same thickness as lead in doors and walls in which installed. 

a.

Form lead sheet to match contour of frame on radiation exposure side of frame, continuous in each jamb and across head and over lap into formed stop.  

b.

Form lead shields around areas prepared to receive hardware.

c.

Fabricate lead lining wide enough to maintain an effective 1/2" (13 mm) minimum overlap lap with lead of adjoining shielding.

d.

Design lead-lined door frames to accommodate lead lining up to 1/2 inch (13 mm) thick.

2.

Door Frame Supports:  2-1/4 inches (57 mm) steel angle iron.

3.

Jamb Depth:  4 ½” thru 14”, in 1/8” increments.

4.

Jamb Profile:  2”

5.

Head Profile:  [2”] [4”]

6.

Frame Thickness:  [18] [16] [14] gauge.

2.16

FINISHES

A.

Field Painted Surfaces:  As specified in “Section 09 91 00 - Painting”

1.

Colors:  As selected.

B.

Prefinished Surfaces:  Colors as selected.

2.17

ACCESSORIES

RADIATION PROTECTION13 49 00 - 9

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