Do you mean build one, or put together a take-down bow?

If it's the latter, it's simple. What kind of td system is it?The limbs will be marked (the lower limb is usually the one that has the poundage, etc. marked on it). It it's bolts/screws, you may have two bolts, or one bolt and an alignment pin. Pretty much self explanitory there. Just be careful that you don't over-tighten the bolts, or you can damage a limb. Just snug is fine, and check them once in a while to be sure they haven't loosened.

If you are talking about building a bow, I'm no help.

Chad