1. Masonry Design

2. 2 MASONRY WALLS CONSTRUCTION TYPE Single Wythe Cavity Prefabricated Barrier Masonry Veneer Masonry Bonded Hollow Wall

3. 3 MASONRY WALLS STRUCTURAL FUNCTION Veneer Nonloadbearing Loadbearing Shear

4. 4 TYPES OF LOADING External Loads Gravity Wind Earthquake Earth pressure

5. 5 ACCUMULATION OF AXIAL LOAD WITH HEIGHT BEARING – WALL BUILDING

6. 6

7. 7 AXIAL STRESSES IN BEARING WALL WITH UNIFORMLY DISTRIBUTED AXIAL LOAD

8. 8 AXIAL STRESSES IN BEARING WALL WITH CONCENTRATED AXIAL LOAD

9. 9 ARCHING ACTION BETWEEN MULTIPLE OPENINGS

10. 10 FREE-BODY DIAGRAM OF A LINTEL ACTING AS A BEAM

11. 11 FREE-BODY DIAGRAM OF A LINTEL ACTING AS AN ARCH

12. 12 SHEAR WALL LOAD FROM ROOF OR FLOOR DIAPHRAGM

13. 13 ACTION OF HORIZONTAL AND VERTICAL STRIPS ASSUMED FOR DESIGN

14. 14 SPAN-TO-WIDTH RATIOS FOR FLOOR DIAPHRAGMS

15. 15 STRUCTURAL ACTIONS ON SHEAR WALLS

16. 16

17. 17 Bar Size Designation Diameter (inches) Weight lb/ft Nominal Perimeter Nominal Cross Section Area (in 2 ) Bar Size Designation FractionDecimal #33/80.3750.3761.1780.11#3 #41/20.5000.6681.5710.20#4 #55/80.6251.0431.9630.31#5 #63/40.7501.5022.3560.44#6 #77/80.8752.0442.7490.60#7 #811.0002.6703.1420.79#8 #91 1/81.1283.4003.5441.00#9 #101 1/41.2704.3033.9901.27#10 #111 3/81.4105.3134.4301.56#11 #141 3/41.6937.6505.3202.25#14 #182 1/42.25713.6007.0904.00#18 ASTM Standard Reinforcing Bars

18. 18 Required Lap Length of Bars in Inches* Bar Size Diameter (d, in.) 2005 MSJC Allowable Stress Design 2005 MSJC Strength MBC 2006 Allowable Stress Design (48d, in.)** MBC 2006 Strength Design 8" CMU 12" CMU8" CMU 12" CMU #33/815.1 18 15.1 #44/820.1 24 20.1 #55/825.2 30 25.2 #66/842.839.342.836 39.3 #77/859.445.859.442 45.8 #88/891.260.491.248 60.4 * Assume bar placed in center, Grade 60 steel, 48" o.c. spacing, and f' m =1500psi ** Where design tensile stresses are > 80% of F s, lap length shall be increased not < 50% of the minimum required length.