The roof is of shingles over wood trusses.
Built in 1926, the Irving Branch had a long, airy room with exposed wood trusses and rafters.
By the end of that summer, the designers crafted a plan to entirely remove the roof and lower into place 50 prefabricated light-weight wood trusses.
All the main rooms are large, with one-and-a-half-story ceilings and exposed wood trusses.
A platform hall, built as a wood truss in 1990, spans both tracks.
It has three bays with a hipped flat-seam roof with wood trusses.
A strong competitor for wood trusses, as well as an alternative to conventional framing lumber, is steel.
In buildings with large, clearspan wood trusses, the most critical connections are those between the truss and its supports.
In the 1950s and 1960s, metal-plate-connected wood trusses were developed, increasing roof spans, eventually up to 100' (30 m).
Artifacts recovered from the arena, including original wood trusses, are planned to be incorporated into a heritage display when the new fire hall is completed.