Questions tagged [engineering]

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4
votes
15answers
18k views

What is the cheapest way to stiffen a tube/pipe?

I have some steel tubes (18 mm OD) which I wish to use as horizontal members in a storage rack (a bit like shelves). However, the tube flex and bend quite a bit when I put heavier boxes on them. The ...
0
votes
3answers
59k views

My 5th (top) floor apartment is shaking; what might cause this?

I live in a developing country (so don't have much faith in building codes), and have been experiencing increasingly noticeable and frequent "shaking" in my top fifth floor apartment. I'm seriously ...
4
votes
3answers
7k views

How can I support a large aquarium built into a wall?

I have a wall that goes 3/4th of the way to the ceiling between my living room and dining room. I would like to put a fish tank in it, spanning the length of the wall. I have the engineering skills ...
3
votes
1answer
1k views

What exactly is magnetic drilling equipment?

What puzzles me is a term "magnetic" in the context of Magnetic Drilling Machines by Euroboor (for example).
5
votes
3answers
28k views

How can I calculate the load capacity of a platform?

I'm planning to build a very basic bed frame, but I'm not sure what size lumber to use. I was thinking of building the entire thing from 2x4s (legs would be 4x4), but I'm not sure if this will be ...
27
votes
9answers
278k views

How much load can a (wood) board support, if it is supported only at the ends?

How much load can a board support, if it is supported only at the ends? At the moment my specific problem is hanging a tire swing between two trees, and depending on which trees I choose they could ...
6
votes
4answers
43k views

How strong are bolts compared to welding and what qualities to look for in foundations?

I'm planning on building a home climbing wall, made from a mild steel subframe. It will probably be around 10 feet tall approx. I was thinking along the lines of using mild steel angle, cutting to ...
4
votes
4answers
936 views

Air conditioning on a shoestring budget

Without purchasing expensive air-con units, or solar panels - and the associated moutings and electrical paraphernalia, is it possible to create a temperature difference of 10-20 °C using materials ...
77
votes
12answers
51k views

Is there a case where nails are better than screws, from an engineering/structural standpoint?

Is there a case where nails are better than screws, from a structural standpoint? For instance: Say you used screws instead of nails on a backyard deck, when the design specifically called for nails. ...
4
votes
1answer
2k views

How much weight should a deck of a given area support?

How much weight should a deck of a given area support, either according to building codes or convention? In my local (Massachusetts) building code, I found the answer for floors (40 lbs/ft2 live load)...