... layer, circle, arch, flat*FEATURE OF THE LED SCREEN TRUSS1Easy to install and uninstall,with spigot pins 2.high capacity and stability , ... ladder platform, , lectern, plinth and screen stand*PROCEDURE TO INSTALL THE LED SCREEN TRUSS SYSTEM1.install the plate with base joint, insert the ... base joint with pillar, link sleeve block with beam3.Install the top section with pillar,roll the sling*ADVANTAGE ...