Every year numerous formwork failures are reported. In all of them a pattern is fairly uniform: failures accompany a fast rate of placing of concrete and occur during the stage of construction when forms had been used several times and work is routine. Few failures are reported at the beginning of the job; failures seldom occur in small operations. Some conclusions are: the weakness in the designs is in details rather than the main structural members, since similar designs have been successfully used; high shoring is more susceptible to failure when not diagonally braced; shock and vibration form the use of duck board runways must be controlled; lateral force from power buggies must be provided for in the design and details; and details which are difficult to perform, such as the overhand driving of nails to connect flat cap plates of a shore to an unloaded wood joist, will often not be properly performed and may start a failure. Also, forms are continuously supported structures and must be provided with uniform bearing at each support; wedging of posts to counterbalance load compression must be done under proper supervision so that a previously properly assembled form support is not disrupted; and repetition of the maxim: some degree of skilled labor should be employed.