Gang forming has the potential for saving the contractor a great deal of many on one of the most expensive aspects of concrete work: the forming operation. It also can be an exercise in futility. Success depends on accurately assessing whether gang forming is feasible for a given job and knowing the best techniques for carrying out this approach. Gang forming produces a savings only when it is planned and managed properly. Five factors will determine whether it provides a sound approach to a given job: job design and specification, amount of repetitive forming and reusage of gangs that can be expected, size of the crew, equipment- rented, owned or to be purchased, and required method for handling forms. A calculation of the amount of repetitive forming and reusage of gangs for a given structure will be among the first indicators as to the suitability of gang forming. A takeoff from the structural drawings will show the amount of repetitive forming called for and an estimate of the amount of restage of gangs can be made rather easily by reference to the amount of equipment available and the job schedule. Crew productivity is going to depend on how the work cycle is set up and whether, by proper planning, idle time can be avoided in ganging. Usually, the larger the job the easier it is to keep crews busy setting, placing and stripping operations at different locations. Gang forms are erected in must the same way as single forms except that the sections are larger. The proper equipment to use in handling will depend on the weight of all gangs used. An average gang weighs from six to seven pounds per square foot including hardware, waling, and strongbacks; additional accessories increases this figure. For all-steel gangs or gangs designed for heavy construction the square foot weight will be greater. Gang forming is easiest on long, low walls because gangs can be made up in long lengths with little or no waling or strongbacking. Usually both sides can be ganged and the gangs moved by crane, rollers, or dollies, ground conditions permitting. On higher walls adequate waling and strongbacking will be required.