Replacing truss advice needed

[Nappyloxs]

Repairing stick built roof advice needed

I need to replace the truss in my 40ft garage. The previous owner added an addition to the garage and the trusses are diy. It has held up for years but really feel like it is time to replace. I had a new roof put on about 3 years ago so I don't want to replace the roof.

I am thinking of the following options:
Contact truss company for design and contractor recommendation
Get a structural engineer
Get a general contractor/framer

I would like storage truss design if possible. My plans for garage is to add some storage, insulate it so I can add a year round home gym in there, and seal concrete floors, and walls.. I live in Denver so experience all four seasons. I would like to get it all done at once since the garage would be empty. But really would like the truss replaced first and foremost. Also what would be a good ballpark figure replacement.

I attached some photos to help

 

[The Cobbler]

new trusses without doing the roof? afraid that can't really happen

 

[Nappyloxs]

Fyi. Here are more pics.
<iframe width="480" height="360" src="http://s1376.photobucket.com/user/John_Sheil/embed/slideshow/"></iframe>

 

[Nappyloxs]

new trusses without doing the roof? afraid that can't really happen

Read about jacking up roof so that is why I mentioned new.

 

[BillK]

Those really are not "trusses" It looks like a stick built roof which is absolutely fine if it was done properly. If you want to know for sure, have a good local carpenter or builder take a look at it. I bet it is fine.

 

[readhead]

First, you don't have a truss roof now. The only way to have a new truss roof with storage will be to remove the existing roof structure and replace it with a new roof system and new roofing.

 

[Nappyloxs]

Thanks. The first few photos are of the preexisting garage. The later photos are of the addition. One of the beams snapped a few years ago and I have always been concerned. Neighbor said it was sagging a lot from his view. I wasn't really sure what type of support it was. Thanks billk for letting me know.

 

[readhead]

How does the steel beam fit in the plan? Does it replace a wall? A few outside pictures would help to understand the addition. The new framing isn't very precise but it's still up.

 

[Nappyloxs]

How does the steel beam fit in the plan? Does it replace a wall? A few outside pictures would help to understand the addition. The new framing isn't very precise but it's still up.

Steel beam is across the middle of the garage. Where the back wall of the old garage was at. I can take some pics tomorrow. Yes, beams aren't in metal settings, two piece of wood acting as beam, etc... I notice some bowing in the 20ft beams.

 

[matt_i]

I think its a mistake to do anything other than tear the building down to the walls and re-frame the roof with new trusses. My first advice is to measure the roof pitch and decide if the attic truss is even viable. I would guess without calculating that below a 6:12 it doesn't make a lot of sense.

 

[ndm]

Looks like a simple hip roof stick built. Cant you sister rafters to the broken rafters to increase the strength?

 

[ard]

First, as others have stated, you will not get 'trusses' up into that roof without removing the roofing and sheating. You need to understand that a TRUSS is a very large, somewhat fragile assembly that gets set with a crane. Then once stacked, plywood is sheathed over it- then a roof. You simply cannot attach a roof to a truss from underneath.

So stop with that idea.

What you CAN do is ensure your existing framing is properly supported.

You could post 1000 pictures and I would not be able to really understand what is going on... 'addition', 'new wall' , beam... maybe others are following... Im not.

Im old-fashioned- give me a wall plan, a ceiling plan, a roof plan- done

Adding a few beams, then posts to support what needs support- all doable. The frame a ceiling and insulate above.

 

[ms fowler]

Go back to your original plan and contact a local Structural engineer. You may be able to just sister additional joists onto the existing and be good, but an Engineer would be able to tell you for sure. Probably won't be very expensive--just a site visit, and a few hours of his/her time. Try to be there when the Engineer visits.

 

[bczygan]

I understand what is going on here.

Hip roof framing is susceptible to structural problems, especially when built to just good enough standards, like most were.

This is fixable by a few added structural members and proper straightening and fastening.

The exact measures to be taken can only be determined by careful measurements with someone looking at it in person.

An engineer isn't needed, but a competent person, who understands structure needs to look at it. A good rough carpenter or qualified general could do it.

Bill

 

[Disturbed]

new trusses without doing the roof? afraid that can't really happen

Sure it can, I added three new scissor trusses to my shop to make room for the 2 post lift without removing the roof. I had the truss company come in and they designed three piece trusses that could be installed from the inside. Put them up from the inside sistered to the existing trusses then cut out the parts of the existing trusses that were no longer needed. It is very doable, but the trusses are not cheap.

 

[readhead]

In this case he has no trusses to sister to. Bill is probably right but all we have seen are a bunch of close up pictures and don't have a good grasp of the structure as a whole.

Andy

 

[Nappyloxs]

Sorry about the thread name. I tried to change it. I was out there today and thought about sistering the 20ft plus beams in the center of the beams and getting another beam or two. What I would like is more ceiling space but don't think that is really possible. I would like enough beam strength to hold little stuff such as Christmas tree and decorations.

A friend mentioned putting sliding doors where beam is and insulating the addition would help, so I may consider that. I have a contractor coming over today and am trying to get a hold of a structural engineer. They are pretty inexpensive and I rather be safe than sorry.

I uploaded a few more pics with captions