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Design Bending Strength of Reinforced Solid Masonry Using REDIFIX LINTIE
Reinforcing Steel
I. The value of &
for any particular brick crushing strength and mortar com bination must
be obtained from 855628 Table 2. lnterpolation of the tables may be used.
2. The table gives Design Moment of Resistance for solid masonry units
the size of normal clay bricks one leaf thick.The values may also be used
for blockwork but only in the case of 1 reinforcing bar Partial safety
factors
2.3 and = 1.15 have already been allowed (Ref. 855628).
3. No check for deflection will be required if the span: effective depth
ratio is not greater than 20 for single spans, 26 for continuous spans
and 7 for cantilevers.
4. The M of R values do not apply for span: effect depth ratios less than
1.5.
5. The Design Moment of Resistance values given assume a normal tensile
ductile failure except where these are given in bold italics,
6. The average design shear stress over the effective depth of the beam
must not be greater than 0.1 75N/mm2 except under special circumstances
(see 855628 Part 2).
7. The reinforcing bars to be used are ITW LINTIE and must be installed
entirely in accordance with the recommended procedure of ITW.
8. Effective lateral tying of the brick leaf has been assumed, i.e. part
of a cavity wall system with a minimum of 2.5 per meter squared.
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LINTIE LINTEL REINFORCING
Sample Calculation
DESIGN CONDITION Outer
leaf lintol of span 2.8m supporting 900mm of
masonry to the cill of the window above.The masonry is of standard format
SOLID frogged bricks, compressive strength 0 N/mm squared, in mortar designation
(iii), i.e. 1: 1: 6 mortar.
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