Historical information
Pattern for a W4 class Trolley Deck Bridge. Multiple of such bridges are used to support the Trolley Deck on roof of tramcar. MMTB drawing R7623 for SW6 trams appears to be similar and shows they are used in a trolley deck.
Significance
Demonstrates a part in the construction of the trolley deck on a Melbourne electric tram.
Physical description
Wood section cut out to form a pattern
Inscriptions & markings
MELB W4 TROLLEY DECK "BRIDGE'
