... the unit weight of masonry is 21kN/m3 Design the beam for serviceability condition (␥f=1) Solution (clause 29.1, BS 56 28: Part 2) (clause 29.2, BS 56 28: Part 2) Assume Mi is 30% of Md+L so (from ... four 10.9 mm diameter stabilized strands of characteristic strength of 1700 N/mm2 The area of steel provided is 288 mm2 The initial modulus of elasticity of the steel is 195 kN/mm2 and the stress-strain ... bonded From the point of view of durability, it is highly desirable to protect the tendon by grouting or by other means as mentioned in clause 32.2.6 of BS 56 28: Part For brick masonry, post-tensioning...