Joists and Beams

[Makoto]

Hey guys below is a representation of my joists and beams. The big empty section is where my lift is. I need about another foot or so and am considering going with I-Joists but I'm not sure what to do about the beams since the big empty section will be about a foot taller than the rest of the ceiling.

Surely this has been done before. I've been seeing various things looking around for ages. Any ideas?

The roof is the 4 sided pyramid style (not sure what that is called).

 

[kbs2244]

Any reason you can't have the whole ceiling at the high level?

 

[Crfdell]

That would be a hip roof. Cant help with the joist.

 

[Makoto]

Crfdell is right. I'd like a full 10 foot ceiling but I'm not sure how to go about doing that with the hip roof. Any advice is appreciated. thanks guys.

 

[jav]

Not sure what the question is... I presume the beam/joist arrangement is for a 2nd floor? Is the Hip roof on top of 2nd floor "walls" or directly on the the 2nd floor structure? What size is the foot print of the building so we have some idea of spans?


OK- I found your other post so i think what your asking is how to best gain a foot at the ceiling? From your other posts it looks like your referring to the existing joist and beams?

If so-a couple observations- these really aren't "joists and beams" but appear to be "ceiling joists/rafter ties". Their primary function is keep your walls from spreading out as a result of roof loads. IRC building codes /span tables expect the rafter ties at base chord (right at the base of the rafters) BUT- it allows them to be moved up within the first 1/3 of the rafters birdsmouth cut to peak distance... so you may have some room there.

Also- I-joists wouldn't help you as these ties operate in tension (horizontally)... the roof loads try to stretch them out and make them longer) while I-joist are intended for "vertical" loads over longer spans. If you're looking to store heavy loads above the ceiling, then I-joists might be appropriate but not solely as an aid to raising the ceiling height.

Hope this helps.

 

[DekeT]

Remove those "beam/joists" and install collar ties in all directions a foot higher than what your existing ceiling is could accomplish that. Install some collar ties before removing your current bracing.

I would just rip off the roof and raise the interior with new truss design to get clearance and little storage. It would look better too.

 

[Makoto]

Remove those "beam/joists" and install collar ties in all directions a foot higher than what your existing ceiling is could accomplish that. Install some collar ties before removing your current bracing.

that sounds like a good idea, i'm going to research that. thanks!

I would just rip off the roof and raise the interior with new truss design to get clearance and little storage. It would look better too.

even if its a new roof and you had neither the time nor money to do that?