[Rafacacho]

Hi, I am in the process of planing my house. I want attic trusses, but I dont live in the US and there is none manufacturers here. I first came up with the idea of replacing the conventional metal conectors with bolted metal conectores . But they are expensive and I have to drill a lot. So I came up with this idea, I think its going to work just fine, but I would like some opinions, thanks. Everything goes glued, nailed and clinched were possible.

2x6 top chord
2x6 web
2x10 bottom chord ( might be 2x8)

Should I use 1x instead of 2x to reduce extra weight?

https://www.dropbox.com/s/i8q2a52k5qvrkuj/Truss proyect.skp?dl=0

Thanks!

 

[mako1]

No.You should not use 1X in place of 2x.Here in the us we have used hand built rafters and ceiling joist for years before there were factory built trusses.You need someone to determine the load and determine what you need as far as framing and the size of the material.It would help to let us know part part of the world you are in .It can be done but your plan THAT YOU POSTED WILL NOT WORK .

 

[Daniel Holzman]

The structure that you drew is NOT a truss. A truss is composed entirely of triangular elements, you have an irregular hexagon in the middle of your frame. Analysis of your frame is very complicated due to the lack of triangular elements.

 

[Bud9051]

Can you tell us why you need trusses? Are you spanning a space longer than the traditional 16' material. If you have walls below, they can hold up the ceiling and reduce your costs and time.

Although I have seen where people have simulated truss construction with plywood gussets, nails, and glue, they never achieved the self-supporting design an engineered truss will have. I realize you may not have access to pre-made trusses, but there is more to making them than imitating their shape.

Bud

 

[Rafacacho]

No.You should not use 1X in place of 2x.Here in the us we have used hand built rafters and ceiling joist for years before there were factory built trusses.You need someone to determine the load and determine what you need as far as framing and the size of the material.It would help to let us know part part of the world you are in .It can be done but your plan THAT YOU POSTED WILL NOT WORK .

live in Buenos Aires, Argentina. Weather is not a problem, wind code here is 45m/s , no snow loads. I found a book/guide with trusses plans, and there is a gable roof truss suitable up to 10mts span with 1kn/m2 load capacity made with 1x6', two on the top chord, one for the webs and two for the bottom chord.

Can you tell us why you need trusses? Are you spanning a space longer than the traditional 16' material. If you have walls below, they can hold up the ceiling and reduce your costs and time.

Although I have seen where people have simulated truss construction with plywood gussets, nails, and glue, they never achieved the self-supporting design an engineered truss will have. I realize you may not have access to pre-made trusses, but there is more to making them than imitating their shape.

Bud

Well, I think you are right, a traditional framed roof maybe its my best choice. I was complicating simple things...

Thanks.

 

[Bud9051]

Your picture illustrates a "walk-through" truss used to span 20 or more feet and have usable space up there. A regular truss just uses triangular bracing with no walk-through space. Traditional framing with a mid point supporting wall will go up to the 30' or so AND give you an open attic space. If your rafters are big enough, that space becomes usable.

Bud

 

[Rafacacho]

Your picture illustrates a "walk-through" truss used to span 20 or more feet and have usable space up there. A regular truss just uses triangular bracing with no walk-through space. Traditional framing with a mid point supporting wall will go up to the 30' or so AND give you an open attic space. If your rafters are big enough, that space becomes usable.

Bud

Yes, I was looking for some storage space. But I'll go with traditional framing. Got stucked in the idea of attic trusses and wasnt thinking straight, I will save a lot of time, and still have some space.

Thanks!