Hey. Summer cabin from 1959 with a shed roof
We tore down the drywall ceiling, removed the insulation as we noticed that:
The beams in the ceiling, 45x170, have a span of 5.4 m and are spaced at cc 80-85, then the truss has sagged. Roof pitch about 10 degrees and 2.0 in snow zone. Metal roof to be replaced this summer
We tore down the drywall ceiling, removed the insulation as we noticed that:
The beams in the ceiling, 45x170, have a span of 5.4 m and are spaced at cc 80-85, then the truss has sagged. Roof pitch about 10 degrees and 2.0 in snow zone. Metal roof to be replaced this summer
Then you've been really lucky that the roof hasn't collapsed. Keep it clear of snow for the time being. For a discussion on appropriate measures, at least a sectional drawing is required. Some photos would be good as well.
Hey. A summer cottage from '59, and it obviously hasn't collapsed in almost 60 years so why would it now? Sure, the dimension might be on the lighter side but it will hold up, even if with a little deflection.
Nowadays, people panic if they encounter spans over 3 meters unless it's laminated timber or steel beams.
Nowadays, people panic if they encounter spans over 3 meters unless it's laminated timber or steel beams.
A clear deflection is often a sign that something is not quite right... Just because it has stood for 60 years doesn't mean it will stand forever...
Before I wrote post #2, I made a quick estimate and arrived at a deflection of about 1/50 of the span at maximum snow load. That's quite a lot.