Figure 8. Floor lead.
9. Lead-lined doors and accessories.
The number of lead or lead-lined items can be extensive. The list can include control window frames, speaking grills,
louvers, control screens, transfer cabinets, hanger pass boxes, door frames, locksets, and dead locks. Listed below are
some of the available lead-lined items, including leaded glass.
a. Lead-lined doors. Lead-lined doors are a solid wood core or hollow metal flush type door.
(1) Solid wood core doors consist of two solid wood cores with a lead sheet between, of the same thickness of
lead in the partition that the door is a part of, fastened together using steel bolts 1-1/2 inches from the edges of the door
and spaced at 8 inches on centers vertically and horizontally within the door. The bolts are countersunk in the wood core
with poured lead or lead dowels placed over the heads and nuts until flush with the face of the core. The door is
crossbonded, veneer is applied, and hardwood edge strips are provided to match the face veneer. Wood doors requiring
hardware are mortised on the jobsite.
(2) Hollow metal doors are fabricated of 16-gauge steel with a sheet-lead core the full size of the door,
supported by 16-gauge steel brackets that prevent the lead from cold flowing or sagging. The metal exterior of the door is
painted with a shop coat of primer for on-site finishing to match other colors. Openings for hardware are factory prepared.