1.0 video FX108.52B | Examples of Unobstructed Construction: Bar Joist Construction 960 540 iPlayerHD https://iplayerhd.com <iframe src="//iplayerhd.com/player/video/537692a3-b2cf-4846-a84d-781b3d3997bf?cbartype=over" allowtransparency="true" frameborder="0" scrolling="no" allowfullscreen mozallowfullscreen webkitallowfullscreen oallowfullscreen msallowfullscreen width="960" height="540"></iframe>