ABSTRACT
Possible methods of construction in reinforced masonry (illustrated in Fig. 10.1) may be summarized as follows:
(A) Reinforcement surrounded by mortar (i) in bed joints or collar joints
(ii) in pockets formed by the bond pattern of units (iii) in pockets formed by special units
(B) Reinforcement surrounded by concrete (i) in cavity between masonry leaves
(ii) in pockets formed in the masonry (iii) in the cores of hollow blocks (iv) in U-shaped lintel units
Type A(i) is suitable for lightly reinforced walls when the steel is placed in the bed joints, for example to improve the resistance of a wall to lateral loading. Larger-diameter bars or reinforcement in two directions can be accommodated when the steel is placed in the collar joint of a stretcher bond wall. Such an arrangement is suitable for a shear wall. Type A(ii) includes Quetta bond and may be used as a means of introducing steel for controlling earthquake or accidental damage. The use of specially shaped units produces a similar result. In these methods the steel is placed and surrounded by mortar as the work proceeds.
