Steel structure design for single-story home/office with roof terrace

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Job Description

Hi, I hope you can help me to check my amateur design of a single-storey home/office (36sqm). Instead of a roof, I'm building a terrace, probably using wood-cement boards.

It's a very low-budget project that I'm building myself with the help of local handymen.

The cement board requires beams every 60cm, so that's easy enough to design (a 10x10 grid). I have a rough plan already, but I don't know what shapes and sizes of the steel members are required to safely support a cementboard-and-tiled first floor without overspending on the material. Nor whether there is an easy way to bolt the members together or whether they all have to welded together in some way.

Just to let you know, I'm in the north of Thailand where there is no snow (it's mostly hot and humid), but there is a lot of rain and some strong winds occasionally.

Please can you help provide me with a list of steel members required to safely support the structure and where to position them. I don't need a detailed analysis and report to submit to inspectors, just a simple list and a basic plan to guide me in this DIY project.

Any other suggestions and ideas gratefully received :)

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