Common Rafter Part 2

[@bravo3541]

Great lesson. especially plugging in Height Above Plate calculation to fixed ridge height. For years I built additions by cutting rafters then joining them to a loose ridge then spiking all in place. Nice to learn something different. Thanks.

[@musvolk]

Hi Halftime, I use span tables for rafter sizes. Ridge beams and hip rafters are generally supported by rafters so I size them the same depth as the rafters. Valley rafters support a lot of load so, I suggest doubling them up or having them engineered if the span is great.

[@musvolk]

Thanks for the positive comment. The building is 36' and since the rafters at 2' o.c., I count 19 per side (don't forget the extra rafter added at the end wall).

[@HAFFT1ME]

Very well made video. Thanks for posting. I'm looking for information about how you choose the proper ridge beam & rafter size. Can you point me in the right direction? Is there a snow load/ high wind calculation? Thanks.

[@musvolk]

Whoops. So much for abbreviations. I'll rephrase. The building is 36 feet long and the rafters are at 2 ft o.c. So, I count 19 per side if you account for the extra rafter at the end wall.

[@musvolk]

alflud asks: at 7:50 is that height above plateline distance supposed to be height above ridgeline? My response: No, height above plateline is correct. Thank you for your comments.

[@matty2000shoes]

So the material height of the ridge beam is 12" ?

[@musvolk]

That depends. If the ridge beam is not supporting a load and if the ceiling side of the rafter gets finished, I would use the same dimension lumber as the rafters.

[@TheToolnut]

I always use a ridge one size up from my commons. So for example if I was using 6"x2" for the commons my ridge would be 7"x2". The same rule applies for hips and valley's. This is my rule of thumb if greater span's are involved and or greater loads I would consult span tables, 👍🔨🇮🇪

[@musvolk]

Hi Halftime,