(57) A security door comprises first and second sheet metal door panel members (10, 20),
a pair of internal side rails (30, 31) and a top and bottom rail (40, 41). Each of
the door panel members (10, 20) has overturned lip formations (11, 21) along its edges,
the free ends of which overlie their respective door panel member (10, 20) in spaced-apart
relationship thereto. The rails (30, 31, 40, 41) have a pair of longitudinal grooves
(32, 42) along at least one of their faces, which grooves receive the overturned lip
formations (11, 21) of respective door panel members (10, 20). Between their grooves
(32, 42), the rails may have recesses (33, 34) adapted to receive hinges, locking
mechanisms or the like. The rails may be double-sided with different recess formations
on opposite sides. The constructional features of the door are concealed from view
when the door is closed in use and hence are not vulnerable to attack. For aesthetic
purposes, a capping member (50) may be attached around the door periphery.
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