Figure 13. Lead-lined film transfer cabinet.
opaque shielding panels consist of a single piece of unpierced lead sheet between two panels of plywood, steel,
aluminum, or bakelite.
(1) Operator protective screens that consist of opaque shielding panels with openings for viewing panels are factory
prepared so that the openings will have a minimum 3/8-inch overlap between the leaded viewing panel and the sheet lead.
To provide continuity of shielding when screens are in two or more sections, either the sheet lead extends beyond the
panel to overlap the lead of the adjoining panel with a steel trim over the joint for protection, or the joint is covered with
lead-lined steel trim. Edges that meet the wall and floor are set in continuous steel channels or receive steel clips on both
sides that fasten to the wall or floor. Other exposed edges are provided with steel channel trim. All steel is 16-gauge and
painted with a prime coat of black enamel. Plywood screens are sanded ready for finish coating. See figure 14 for details.