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Old 09-26-2010, 08:46 AM   #16
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I built my own trusses


I have no problem with homemade trusses but you might want to do something about this.
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Old 09-26-2010, 08:46 AM   #17
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I built my own trusses


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Originally Posted by jiju1943 View Post
I built a few buildings just like this 30 some odd years ago and they are still standing and in good shape today. I also worked in a truss factory for a while when my work got slow and I would put my home made trusses up against any of the factory ones any day. As matter of fact I never did trust the metal gussets as they just didn't look like they would hold under pressure. The metal gussets are for speed and the fastest way to build. If you want to compare the two, nail and glue a 12 inch X 12inch piece of plywood to something of heavy wood then press in one of the metal gussets, now see which is the easiest to get loose.
I don't have any problems with homemade trusses as long as they meet code, but based on what you wrote above, then I guess the millions of homes with trusses made with metal gussets should have roofs collapsing within the next 5-10 years since you say they "don't look like they would hold under pressure."

I'm sure no testing was performed on those trusses with metal gussets by the manufacturer to certify their load rating.

If the metal gussets are only for speed, then you wonder why truss builders would spend hundreds of thousands of dollars to buy and maintain giant presses when they can hire someone for minimum wage to put 2x4's in a jig and just glue and nail wood gussets.

Last edited by handy man88; 09-26-2010 at 08:54 AM.
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Old 09-26-2010, 09:05 AM   #18
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I built my own trusses


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Originally Posted by handy man88 View Post
Design vs. repair are two different things.
The standard guide for building glued wooden trusses is:

http://www.public.iastate.edu/~mwps_dis/mwps_web/tr_plans.html

You also need the detailed instructions referenced in the plans, which can be obtained here:

http://extension.missouri.edu/public...b.aspx?P=MWPS9

Occasionally, I inspect a property from the 1950's with site-built glued wooden trusses.

My suspicion (though it's just a guess) is that they are probably stronger than their modern pre-manufactured equivalents as they were likely designed with greater safety margins to allow for their hand-assembled nature.
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Old 09-26-2010, 09:06 AM   #19
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I built my own trusses


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Originally Posted by kwikfishron View Post
I have no problem with homemade trusses but you might want to do something about this.
Nice catch!
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Old 09-26-2010, 09:19 AM   #20
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I built my own trusses


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The standard guide for building glued wooden trusses is:

http://www.public.iastate.edu/~mwps_dis/mwps_web/tr_plans.html

You also need the detailed instructions referenced in the plans, which can be obtained here:

http://extension.missouri.edu/public...b.aspx?P=MWPS9

Occasionally, I inspect a property from the 1950's with site-built glued wooden trusses.

My suspicion (though its just a guess) is that they are probably stronger than their modern pre-manufactured equivalents as they were likely designed with greater safety margins to allow for their hand-assembled nature.
I guess too late for the OP to reference. Hopefully the guidelines match what was built and adhere to local codes.

The only issue may come down the line if the home is being sold and permits are not available.

Last edited by handy man88; 09-26-2010 at 09:21 AM.
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Old 09-26-2010, 09:37 AM   #21
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I built my own trusses


Quote:
Originally Posted by handy man88 View Post
I don't have any problems with homemade trusses as long as they meet code, but based on what you wrote above, then I guess the millions of homes with trusses made with metal gussets should have roofs collapsing within the next 5-10 years since you say they "don't look like they would hold under pressure."

I'm sure no testing was performed on those trusses with metal gussets by the manufacturer to certify their load rating.

If the metal gussets are only for speed, then you wonder why truss builders would spend hundreds of thousands of dollars to buy and maintain giant presses when they can hire someone for minimum wage to put 2x4's in a jig and just glue and nail wood gussets.
Have you ever seen the metal plates pressed in personally? If you did and still thought they were the best thing going I would question your building expertise. It is very obvious that the metal plates do hold or they wouldn't be still using them, right? It is a fast way to cut corners and for the high dollar presses you are talking about, the ones the company I worked for would have cost about $500 as it was just one press that had to be taken to each gusset.

By the way, how many houses have you built and how big were they?
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Old 09-26-2010, 10:00 AM   #22
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I built my own trusses


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Originally Posted by handy man88 View Post
I guess too late for the OP to reference. Hopefully the guidelines match what was built and adhere to local codes.
Yup, in my business we pretty much have to recommend evaluation by a structural engineer if stamped plans are not available even if we are convinced such trusses are way overbuilt, because the *next* buyer may have similar concerns. For same reason I always recommend that a copy of SE's clearance letter be stapled to the truss closest to the attic access
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Old 09-26-2010, 10:01 AM   #23
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I built my own trusses


I wouldn’t say that the use of “gang nails” (not metal plates) is a “fast way to cut corners”. It’s all engineered. That’s why they're called “engineered trusses”. A truss factory is just that, a factory. Speed in production is everything. Not to mention gang nails provide a flush connection unlike a plywood gusset that may cause issues in packing and shipping.

Have you ever tried to pull a gang nail off? Not fun.
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Old 09-26-2010, 10:07 AM   #24
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I built my own trusses


Hey kwikfishron I have know idea what you think you saw but what you are seeing is the end of the gusset not a gap there so before you tell me i overlooked something maybe you should ask questions first and i think it will be fine i had 4 guys up there over 800 lbs of weight and she didnt budge........and handyman its not a 2 car garage its a one car garage and my work shop to the left of the door and storage on the right side or there will be room for me to tear a car or truck apart to rebuild it
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Old 09-26-2010, 10:09 AM   #25
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I built my own trusses


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Originally Posted by jiju1943 View Post
Have you ever seen the metal plates pressed in personally? If you did and still thought they were the best thing going I would question your building expertise. It is very obvious that the metal plates do hold or they wouldn't be still using them, right? It is a fast way to cut corners and for the high dollar presses you are talking about, the ones the company I worked for would have cost about $500 as it was just one press that had to be taken to each gusset.

By the way, how many houses have you built and how big were they?
I guess you'll get a chuckle driving down the highway next time when there's suddenly going to be roofs collapsing like dominoes at the nearest McMansion community.

I've seen gussets pressed into trusses and the presses that were used are large enough to press all the gussets at once for a single truss. I'm talking about large hydraulic presses, not the tiny ones you're experienced with.

As I've said before, I have no problems with the wood gussets as long as they meet code.

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Old 09-26-2010, 10:17 AM   #26
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I built my own trusses


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I wouldn’t say that the use of “gang nails” (not metal plates) is a “fast way to cut corners”. It’s all engineered. That’s why they're called “engineered trusses”. A truss factory is just that, a factory. Speed in production is everything. Not to mention gang nails provide a flush connection unlike a plywood gusset that may cause issues in packing and shipping.

Have you ever tried to pull a gang nail off? Not fun.
Not only packing and shipping, but a lot of times, these trusses are left out exposed to the environment after delivered to the job site until they are installed and a roof is put over the house. We all know what happens to glued and nailed wood when exposed to the elements, such as delamination, warping, cracking, etc.

I'm not so sure what "speed manufacturing" does for you when comparing gang nail installation vs. nails/glue/boards. For sure, there's less capital equipment investment for the latter. I mean, how much more effort does it take to put down a bead of adhesive, and nail down precut boards with a nail gun?
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Old 09-26-2010, 10:52 AM   #27
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I built my own trusses


Don’t know about speed but it’s defiantly more material.
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Old 09-26-2010, 11:17 AM   #28
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I built my own trusses


My pole barn is built just like that. It is 30 years old though. Would I waste my time to save a few hundred bucks and take full responsibility????? Never. It's his bed, he can sleep in it. Anyone's approval or disapproval on a website means nothing. If anything happens, someone will be looking for the responsible party.

IMO, you are playing with fire. I've seen plenty of barns come tumbling down with heavy snow.

BTW, you are going to need plenty more strongholds on the bottom of those trusses to pass inspection. Your inspection card from the truss company will show where and how to place them. Better do some research because you are now the truss company.

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Old 09-26-2010, 11:46 AM   #29
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I built my own trusses


Looks like you are almost there. Some basic bracing: http://www.sbcindustry.com/images/pu...ges/pbrace.pdf

Add a 2x4, alongside (inside) and below the gable top chords you weakened with the let-in lookouts. This is your weak area carrying the overhang snow load rated at double the roof square foot snow load.

Remember to notify your H.O.Insurance carrier of the new garage to maintain full coverage.

Put some H-2.5 Simpson connectors at each truss/wall joint for high winds and up-lift.

Gable bracing is required for wind, snow or seismic loads, check with your B.D. for the paper trail required by the H.O.Insurance.

Gary
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Old 09-26-2010, 06:16 PM   #30
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