Structural Engineering for small simple structure.

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Project Budget (USD)
$30 - $5000

Project Description:
I'm posting this to get bids but will most likely cancel. I just want to see what response I could get. Later if I get funds for this I may post it again.

I have book on wood structural engineering called "Design of Wood Structures"

I'd like someone to engineer this for me and give me the calculations I suppose in a spreadsheet.

I want to use 4x4's, probably pine as timber frame like bents I think its called.
for a lean-to type structure. I need the roof to hold up partially translucent fiberglass corrugated roofing panels. Should hold up ceiling fans and possibly florescent shop lighting. No insulation or ceiling materials.
One side of the structure would be 8' and the other probably 12' or more. tall side height depends on the span and slope needed. Eves on the sides may be necessary just to get the rain away from the sides, not sure how long we need them to be. I'm going to panel the sides with same roofing material. I'm thinking these panels are 3' wide so the bents will be 3' apart.
Now the question is what kind of longitudinal lath, probably 2x4? And spacing on that. Now since I want to possibly build this by expanding it 3' at a time as I get cash for materials, the 2x4's could be cut to fit in-between the 4x4's or 4" less than 3' in length. A joist hanger bracket might support each 2x4.

The side post on the bents will be cemented into post holes. Would be nice to figure into this a floor girder? joist? using 4x4 again, going across at 18" above ground level, as well as with ground level floor (not part of the structure) as in dirt or concrete floor, or brick floor.

Bracing might be considered at sides as long as we are above head level 6' . Longitudinal bracing would be cut to fit the 2' 8" space between bents and probably would be 4x4's horizontal. Say one at top and one at about 18" I may want to use small nuts and bolts instead of nails for all attachment. Keeping the connector size small will avoid additional calculations.

So the engineering problem here for me is the optimal span length of the lean-to roof and distance between lath for supporting the roof load. And size and type of bracing needed to ensure the 4x4 post can support the roof load. And at the same time make it resemble a timber frame structure.

Skills required:
Anything Goes, Arts & Crafts, Education & Tutoring, Engineering
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