truss construction shed roof

[Mats Fröberg]

Hello all creative builders,

I am in the process of completing my house, which is a modern-style house with a shed roof. I have decided to make use of the space that exists in the attic where the shed roof reaches sufficient height. I will reinforce the entire roof structure with a truss beam, perpendicular to the rafters, which will be 7 meters long and rest on the outer walls. I am now wondering if it matters whether you load the truss on the lower chord, instead of the usual upper chord. I would appreciate feedback and also on the placement of the tension and compression members in the truss beam. Please take a look at the attached picture of how the whole thing is planned to work.

Best regards,

Mats Fröberg

 

[Willy Sangwill]

Hello Mats!

Regarding forces, the same normal forces appear in the bars, but the moment differs between the lower and upper frame.

I want to reverse half of the tie rods (diagonals), so you get a more symmetrical beam. As it is now, you get tension in half of the vertical bars and compression in half of the diagonals.

 

[Mats Fröberg]

Hello and thank you for the response. I would appreciate it if you could show your thought process with, for example, a PowerPoint slide. I assume you want the order like a V with an I in the middle of the V.

Regards,

Mats

 

[Willy Sangwill]

Here is the picture

 

[Mats Fröberg]

Thank you very much for the help! Will look and think.