Building roof truss designs and trying to get it to scale

[Fran]

The roof truss designs below are roughly 300mm wide, based on OO scale this would mean the building/ engine shed would be 75' wide?
I know that some buildings would be that wide but I imagine the design would be more 'industrial/commercial' these look that they're agricultural/domestic style.
Does anyone have a links specifically railway building design that I maybe able to imitate? 
My other concern is that the spars may get too thin, they're currently 2mm. Maybe a truss style roof isn't the way to go for a model building.

 

[Colin R]

I am surprised this hasn't had a reply yet. I think there are a couple of textbooks out there that can certainly help you to get the right, it you want to model the L&LSR then the engine shed at Pennyburn, you need to figure out a way to show the Belfast Trust arrangement.

Peco do a trust for its OO gauge carriage shed, which might also be worth looking at. I will have a look at what I have and get back to this thread   

[Broithe]

@murrayec may have something to say here?

I don't actually remember this question being posted, but it has given me flashbacks to the trauma of doing Maxwell stress diagrams - which I wouldn't have the slightest idea of how to do now.

It always seemed to me that trusses, particularly in roofing, were often down to personal preferences and a 'house style'.

[murrayec]

Not really my thing, this would be a structural engineer's question. Though like Broithe's I do remember that trusses are designed on a triangulated form- all truss designs can be broken down into sub-triangles!

A Google search on truss design will give you a wealth of information, also Google search engine shed photos?

Truss Design;-

https://www.google.com/search?client=firefox-b-d&hs=2ZXB&sca_esv=9c80a20fd8ee6bf4&sxsrf=APpeQnstTmz7LJ-oyOPAikCSQ6-zAx3RZw:1792860074100&udm=2&fbs=ABfTbFVyMZGZf1hfvX9uKjN_-G8c4u0nXx4bEIpwm1lnNH832cSpkWkfSwsmpNIrD_OQ-UdFAe4qAwsQWVbrtprjzBSpD5WmxHV9GQVdPkL5dutr9Tsk9Psqv8-BeuxQCSKzxuGpkDeZ8iXI-CcjRzWQgvHa7UDv7gTcjy-XfyZymi1rYZAPBLe-_W1YsnfcpDzTRDqEt_20&q=truss+roof+design&sa=X&ved=2ahUKEwjHsOSejNOXAxWtU0EAHfp7DygQtKgLegQIDhAB&biw=1280&bih=871&dpr=1#ip=1

Engine Shed Internal Photos;-

https://www.google.com/search?q=engine+shed+internal+photos&client=firefox-b-d&hs=2ZXB&sca_esv=9c80a20fd8ee6bf4&udm=2&biw=1280&bih=871&sxsrf=APpeQnuZ2cfBE1oZkD48UY_goNuqoCGrVg%3A1792860082185&ei=st_cavrfCrmAhbIPyJaqwQ4&ved=2ahUKEwj6gNKijNOXAxU5QEEAHUiLKugQ4dUDegQIBhAN&oq=engine+shed+internal+photos&gs_lp=Egtnd3Mtd2l6LWltZyIbZW5naW5lIHNoZWQgaW50ZXJuYWwgcGhvdG9zSMahAVD9J1jNf3ABeACQAQCYATGgAf4HqgECMje4AQzIAQD4AQGYAhKgAt8GwgIKEAAYgAQYigUYQ8ICBhAAGAcYHsICBxAjGMkCGCfCAggQABiABBixA8ICCxAAGIAEGLEDGIMBwgILEAAYgAQYigUYsQPCAg4QABiABBiKBRixAxiDAcICBRAAGIAEwgINEAAYgAQYigUYQxixA8ICBBAAGB7CAgYQABgIGB6YAwCIBgGSBwIxOKAH8UayBwIxN7gHxAbCBwgwLjEuNS4xMsgHiQGACAE&sclient=gws-wiz-img

Eoin