Shallow and deep foundations. Strap footings. Construction detail, cross sections, of strap beams (connecting beams, ground beams, tie beams for pad or strip foundations or pile caps, grade beams). The detail includes the situation of different types of reinforcement: negative and positive reinforcement (corner and internal bars, upper rebars and lower rebars), stirrups (shear reinforcement) and skin reinforcement (reinforcement of the side-faces) witht steel rebars. Dwg file format.