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W. (1967) High Rise Loadbearing Brickwork, The Architect's Journal, 1967. HENDRY, A. W. and SINHA, B. P. (1967) Racking Tests on Storey-height Shear Wall Structures, Proceedings of the First International Conference on Masonry Struc­ tural Systems, University of Texas, Austin. HENDRY, A. , BRADSHAW, R. E. and RUTHERFORD, D. J. B. Research Note, Vol. 1, No. 2. JOHNSON, F. B. and THOMPSON, J. N. (1967) Development of Diametral Testing, Proceedings of the First International Conference on Masonry Structural Systems, University of Texas, Austin.

Assume that the walls are axially loaded. ) from the inner face of the wall. For long spans and for timber and other lightweight floors an eccentricity of 1/6 is often assumed. In a cavity wall, where both leaves carry an eccentric load, the eccentricity is measured from the centroid of the combined wall and the slenderness ratio is based on the effective thickness of the two leaves. Where only one of the leaves carries an eccentric load, the eccentricity is measured from the centroid of that leaf and the slenderness ratio is calculated from the effective thickness of that leaf.

J - ^ g ) 2? = A · — (3-10) 28 Elements of Loadbearing Brickwork EVALUATION OF CONSTANT B For known values of Eb, Em, vm, vb, d and / constant B can be deter­ mined. For most types of brickwork, the ratio d/t can be taken as 7. Also, the value of vm for mortar is found to be relatively constant at 0-15 whereas vb for bricks is of the same order. Eb + Em The unrestrained compressive strength of bricks σ0 can be best determined by testing the bricks on their sides with their faces ground and placed between similar bricks with their contact faces also ground.

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