1/2 iron pipe. 2-90 deg fittings. 2 - 1/2 iron pipe flanges. Cut pipe to lengths and hight wanted thread ends and screw all together clean off protector oil coat and paint. That the frame. Now hanging lights I simply put I-bolts on my light and used chain and S hooks to hang them and attached the chain to the pipe with 1/2 stand off straps and Bigger S hooks.