The transverse stresses developed in anchorages zone are tensile in nature over a large length and since concrete is weak in tension, adequate reinforcement should be provided to resist this tension.

The tensile stresses which tend to split concrete are placed in transverse direction to axis of member which is more important effect for design, spalling and longitudinal edge tension forces are induced when location of centroid of all tendons is considered to be outside keen of section.

The reinforcement is designed to sustain this bursting tension and it is assumed to act at its design strength of 0.87f_y and stress however is limited to value corresponding to a strain of 0.1% when concrete cover is less than 50mm.

Depending on ratio of depth of anchor plate to depth of beam, transmission length and bursting force can be obtained, position of zero stresses, maximum transverse stress and its magnitude for forces which are evenly distributed are computed by using coefficiants under category of distributed axial forces. According to guyon, bursting tenson is expressed as, F_bst = 0.3P(1-(y_po/y_o)^0.58, p = anchorage force, y_po/y_o = distribution ratio.

The anchorage zone consists of only one anchorage device or group of anchorages devices which are closely spaced, at interface between local zone and general zone of special anchorage devices ahead, concrete compressive stresses.

In case of large bridge girders with massive end block supporting multiple anchorages, end block is divided into a series of symmetrically loaded prisms for computation of bursting tension.

A number of investigations have studied stress distribution in anchorage zone using empirical equations or oretical equations or oretical solutions based on two or three dimensional elasticity or experimental techniques.

The concrete prisms act as end blocks and investigations were carried out on parameters like cable duct or hole, ratio of loaded to cross sectional area, cracking, type of anchorages and ultimate loads.

The length of beam within which dispersion of prestressing force takes place is called as zone of transmission; Guyon has developed design tables for computation of bursting tension in end blocks which are based on his earlier mamatical investigations concerning distribution of stress in end blocks subjected to concentrated loads.

Due to horizontal, vertical and shear stresses induced at zone of transmission, trajectories of principle stresses are formed, line of action of resultant force is taken as axis of an equivalent prism of length and depth equal to twice distance of axis from free edge or adjoining equivalent prism.