This company after searching the open web steel joist system it seem need some changes to provide more efficiency to become more stable and more economical. So started to design an open web steel joist with different connection and also make a composed section partially with top chord joist and web composed single round or rebar individual bars to form a vertical truss type of web. Simple vertical truss all changes will describe in detail under the name of Niazit-joist (Niazit-ceiling)
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