Whats that triangular graph paper stuff called?

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22 Aug 2004
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You know the stuff you used to use in school DT classes for designing things in 3d? is there a technical term? Anyone know of an online applet or some software that would let me do a quick 3d drawing?

Basically im after designing a structure from box steel in 3d and need to work out dimensions and layout etc. Whats the best way to do this dont really wanna buy proper CAD because it will prove too complex to get going and mostly unnecessary. Any advice?
 
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