Gang forming is the grouping of individual forms and /or fillers into one section of single unit so that they can be easily moved or handled. How the section is assembled depends upon the type of form used and its hardware. Long, low walls are the easiest to gang form. Gangs can be made up in long lengths with little if any waling and strongbacking. Such work can usually be ganged on both sides for added speed, since the ties can usually be placed by visual sighting from above. The gang sections on such work can be moved by crane, rollers, or dollies, trailers or any mechanical means. Some contractors have temporarily used bulldozers with a homemade rig to pick up and move sections. In a typical cycle, the gang section is first set and braced. Then the reinforcing steel is placed, and the opposing gang or hand-set forms are positioned. Ganging both sides may depend upon how the ties can be inserted. This operation is usually done last, since it is almost impossible to set a gang section where the ties are in place from the opposing gang and have the movement so precise that the ties slip in place as the gang is set. In stripping, if ties can be broken back prior to removing the gang, all the ties should be removed except for a few to hold the gang in place. These last few ties can be removed once the crane has a secure hold on the section. The normal pull by the crane may release the gang. If not, a wedge or tool that can apply leverage will free it. Crow bars or similar tools should not be used because they may damage the form or the concrete surface. As the gang is removed, it can be tilted back or laid on the ground for cleaning and oiling. Gang forming has also found wide use in shear wall forming. The gangs are made up the same way as for straight walls. As they are moved up, they can be supported by shear wall brackets or anchors placed in the previous lift. Shear wall gang forms are usually made as long and as high as the shear wall. They can be placed ahead of the slab and then the inner gang stripped out and moved up.