28.1 General
a) A beam shall be deemed to be a deep beam
when the ratio of effective span to overall depth, is less than,
-
2.0 for a simply supported beam; and
-
2.5 for a continuous beam.
b) A deep beam complying with the requirements of 28.2 and 28.3 shall be deemed to satisfy the provisions for shear.
28.2 Lever Arm
The lever arm for a deep beam shall be determined as below:
a) For simply supported beams :
28.3 Reinforcement
28.3.1 Positive Reinforcement
The tensile reinforcement required to resist positive bending moment in any span of a deep beam shall,
a) extend without curtailment between supports;
b) be embedded beyond the face of each support, so that at the face of the support it shall have a development length not less than ; where is the development length (see 25.2.1), for the design stress in the reinforcement; and
c) be placed within a zone of depth equal to adjacent to the tension face of the beam where D is the overall depth and l is the effective span.