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Hi my SE has specified quadruple joists to support roof lanterns on a flat roof.
The lanterns are 3000x1500
The joists are supported on a block wall built in one side and hangers on timber bolted to the existing house wall.
I can only find triple hangers, how do I fix them, 2x double hangers overlapped ?
The lanterns are 3000x1500
The joists are supported on a block wall built in one side and hangers on timber bolted to the existing house wall.
I can only find triple hangers, how do I fix them, 2x double hangers overlapped ?