Trusses are Too Short !

**pktraylor** · 05-26-2006, 08:39 AM

I have been doing a lot truss roof and have noticed that when ever I place a truss it is always short.

Check the photo. On one edge of the roof plane the truss is touching the dotted line as one would expect. On the other side the truss is short by 1.5 to 2".

Does not matter which side you start at or end at. The one end is always short.

Does anyone know why this happens?

Paul

**ChiefChris** · 05-26-2006, 08:53 AM

I have noticed that from time to time...

I would want the truss to be short from the line 1½" for the face board.

I'm playin with the truss right now. I just did a basic box with a hip roof as you did, and get the same thing. Let me see what I can find out...

It will only do that on a truss that spans across the entire roof (from wall to wall). The tails on the trusses in girders go all the way out to the overhang.

**ebdesign** · 05-26-2006, 12:28 PM

You want the tail of the truss to be 1 1/2" short to allow for the subfascia that will appear when you build roof framing. The tail that goes all the way to the roof edge is the mistake. Chief always gets one end right & the other wrong. I wonder how Chief determines which one to get right & which one to build wrong.
It's easy enough to pull the tail back before copy/pasting the rest of them, but ..........it's a PIA, for sure.
Jim

**pktraylor** · 05-26-2006, 03:44 PM

I sent a note to the support group using the "contact us address below. Hope that is the right e-mail to present a problem for chief to look at.

Paul

**pktraylor** · 05-27-2006, 04:54 AM

I put in a RED beam to mark where truss ends.

Then I built the roof. I then truned the fascia boards transparent to see what the truss did.

At the end of the truss that was about 1.5 inches from the roof plane line, all appears to be correct. fascia, truss and added beam.

Now look at the end (top)that is always on the roof plane dotted line. The fascia is not located correctly.

I have not heard a word from our support group yet but will post their reply.

Interesting huh!

Paul

**ChiefChris** · 05-27-2006, 05:02 AM

Originally Posted by ebdesign

I wonder how Chief determines which one to get right & which one to build wrong.

I'm not sure how it determine - but I have noticed that it's consistant. The short ones are to the bottom and left of the drawing and the long ones are right and top....

**pktraylor** · 05-31-2006, 04:39 AM

Received this note from Chief:

"This is Brian with Chief Architect Technical Services. This problem had been determined to be a bug in the way the program draws the trusses. It has been reported previously to development so they are aware of the problem. I will submit this bug report to them again on your behalf. " CAS-39580 - Trusses to long on 1 end

For the future,

Paul

**ChiefChris** · 05-31-2006, 05:34 AM

Well - isnt that special.

A bug....hmm. I think that's a term they toss around too freely around these Chief parts....

I have just always went in and manually would make the trusses shorter were needed to accomodate the fascia. i hope they fix it soon. i am trussing a lot more, and hand-framing a lot less. (no offense allen)....

**classicdesert** · 05-31-2006, 11:00 PM

Great, bugs...typically programmers call those "undocumented features" These must really be serious then :-)

**mldecker68** · 05-31-2006, 11:40 PM

Actually, it is an undocumented feature, one which was requested by the Truss Manufacturer's Association. You see, Chief has a probability engine that calculates the likelihood that the truss manufacturer will deliver a truss that is too short and automatically assigns random short trusses to plans, thereby shifting blame for the inevitable mistake to the designer.

The program is just following time-tested building tradition, namely the old C3XSTS rule (Cut 3 Times, Still Too Short).

:-)

Mark

**DougM** · 06-01-2006, 02:20 AM

Thats why they make wood stretchers

but 1st you have to soak it in a bucket of steam.

Doug

**ChiefChris** · 06-01-2006, 03:55 AM

Then spray the trusses with a can of compressed air

**DougM** · 06-01-2006, 09:13 AM

I don't know about you Chris......but the heats getting to me already here in Jersey and it's only June 1st.

**ChiefChris** · 06-02-2006, 04:32 AM

Heat? Haven't noticed....

There was too much sweat dripping off my head for me to notice the heat

....It's only spring you know....

**pktraylor** · 06-21-2006, 05:58 PM

Working with a truss framed roof today and was applying dimensions to the truss details.

After checking, the truss details are wrong and can not be dimensioned. This is real frustrating.

Photo 2 is the dimensioned truss in plan view. Check out the truss detail dimension in photo 1.

Is this area going to be corrected in Version 11 so that the truss part of the program can be used?

What say you Chief?

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