For connecting trusses. There is one circular hole in one end of the pin. Insert the safety detent while installing so as to preventing the pin form dropping. There is a socket in the pin top, with the direction in conformity with that of small circular aperture. While installing, make the socket parallel the upper & lower chord member, so that the safety detent may be inserted into the pin smoothly.

While erecting triple-row bridge, for the convenience of assembly & removal, pin shall be installed as follows: insert the pin of the first row (interior row) of the lower row of truss from the inside to outside, and from outside to inside of the second and third row. All the pins of the upper row shall be inserted from outside.

The material of bailey panel pin is 30CrMnTi, with the diameter of 49.5mm

ZhengJiang Great Wall Heavy Industry Technology Co.ltd (here and after called Great Wall ) is locacted at Zhengjiang city, South of Yangtze River, belonging to Yangtze River Delta economic zone, owning railway station of Shanghai-Nanjing and Shanghai-Beijing High-speed raillways; 30 kilometers away from Zhenjiang seaport, 50 kilometers away from Changzhou airport, 70 kilometers away from Nanjing airport,and YangzhouTaizhou airport; Great Wall has passed ISO Quality Management System Certificate; its WPS and welders have passed BV certification; the raw material and finished products are accepted by International Third Testing Institute such as SGS,CCIC,CNAS etc; In addition,Great Wall has several independent R & D patents

321-Type（British Compact-100） prefabricated highway steel bridge and 200-Type prefabricated highway steel bridge ( Bailey bridge) are main products of Great Wall, which has a full set of components production line for complete bailey bridge set. More than this, Great Wall has developed a kind of large span prefabricated D-Type bridge whose single span can be up to 91 meters, and has completed the load test already and engineering application of the whole bridge.

Great Wall has the surface treatment process of sand blasting, dip coating, spray painting, hot dip galvanizing, zinc aluminum alloy coating,etc with the annual output of more than 10000 tons.

Great Wall has good cooperation relationships with China Communication Group, China Railway Group, Powerchina Corporation, GEZHOUBA Group, CNOOC etc huge state-owned Key Enterprises in railway, road, international government procurement projects, and is also enthusiastic about the public welfare, such like supporting Hongkong Wu Zhi Qiao (Bridge to China) Charitable Foundation, building up all the footbridges for them and supporting China Shanxi TV building Charity Bridge for remote village.

Great Wall steel bridge is not only well- known in China, but also won good reputation overseas; the bridges made by Great Wall have been used all over the world exported to Indonesia, Nepal, Republic of the Congo, Myanmar, Mongolia, Kyrgyzstan, Mexico, Chad, USA, Trinidad and Tobago, Mozambique, Tanzania，Kenya, Ecuador , Dominica etc.

Furthermore, Great Wall has developed the container movement set independently, undertakes heavy steel structure fabricating business, promotes mechanical galvanization process for fastening parts.

The container movement set is not only supplied to domestic airplane manufacturing company, but also exported to country Haiti and so on meeting the demands of moving container in airport dock. The box girder, plate girder, guard rail such steel structures made by Great Wall are also well approved by clients. Great Wall mechanical galvanizing process made up the deficit of electroplating and hot galvanizing, showed extraordinary performance in field of environmental galvanization.

Great Wall considers the quality as company’s life, always accumulates the industrial experience of production and quality, improves production technology and efficiency, follows international specifications to control the quality, improves international competition, supplies the superior products and the best service to the clients with high standard, good quality and branding strategy.

Great Wall will not let you down as long as you choose it.