Use sandbox temporary mount Note 1, sand box with arc welding, welding should follow the "low-alloy electrodes" (GB / T 5118) provides recommended J502 or J506 E5003 type electrodes. Sand box should be welded firmly to ensure a sand box does not crack under load. Before using random sampling is recommended to do a pressure test. 2, sand box cover around the need sanding flush to ensure that the cover can slide up and down. Sandbox generally circular, rectangular, square and other flat shapes, its working principle is the use of smaller sand flow compression performance and greater performance, Simply Supported T Beam stage, Dongying sand box, sand box plug bolt, fitted On sand, sand box supply, cover the lid, as the stand in T beam bottom. After the completion of T beam cross wall, wet seams, cast segments and bridge pier top negative moment tension, out of the plug, so sand from the sand out of the mouth, cover themselves falling under its own weight, sand box model, from the beam end, achieve temporary seat lift, complete stress system transformation. Dongying sand box, Dragon Holdings, sand box production provided by the Industrial Development Co., Ltd. Shandong dragon. Dongying sand box, Dragon Holdings, sand box production in Shandong dragon Development Co., Ltd. (www.julongshiye.com/) this year introduced a new upgrade, the above picture is for reference only, please call the contact picture on this page or telephone obtain the latest information, contact: Mr. Wang.