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First of all, we need to find the number of metal sheets first. because metal sheet is the variable that will give us the number of rafters and beam and purlin length and these roof structures are related So take the length and number together. if find one It will cause excess or lack of work. 00:00 Title 00:58 1. Find the number of metal sheets 04:19 2. Find the length of the beam and purlin (equal length). 05:36 3. Find the number of rafters and each distance 07:56 Summary and roof structure problems roof truss connection https://c.lazada.co.th/t/c.Ybiobm Cordless drill (battery) shooting metal sheet https://c.lazada.co.th/t/c.YbioTr metal sheet screw https://c.lazada.co.th/t/c.Ybio0c Recommend a guide to building a modern house   / 3294731140813846   Contents in the guide to building a modern house Gathered from clips from ep.1-17, from land filling, building a house until completion There are every step and there are 92 pages of illustrations that can be used to study and guide the way in building a house. or can track the progress of building a house If you are interested in a guide to building a modern house, talk to us. Page :   / daddytechnician   Facebook :   / xyoongchaj   Line: chart-xyoong Calculate the roof structure # Find the number of metal sheets # Find the number of rafters # Find the length of the beam