cara pasang balok kayu untuk atap rumah praktis

how to install wooden beams is easy and practical with used or second-hand wood, this is very strong and hard, install the top height of the sopi 2 meters and weigh it with a spirit level so that the result is flat and straight, then the lowest wooden field, then install the beam between the top and bottom wood and measure the distance of the wood 150cm,, install the middle wood flat, thread that's it continue installing bamboo,,, greetings, hopefully useful,,, @master building