1. MASONRY

2. THE HISTORY OF MASONRY DATES BACK TO THE EGYPTIAN PYRAMIDS, THE COLISEUM IN ROME, AND THE GREAT WALL OF CHINA

3. SUN-BAKED CLAY BRICKS WERE USED IN THE CONSTRUCTION OF BUILDINGS MORE THAN 6,000 YEARS AGO

4. THE SKILL AND PRECISION OF THE MASON CAN NEVER BE REPLACED BY MACHINES

5. Construction of Brick/block  Brick is composed of shale and clay.  Brick is fired in kilns of approximately 2,000º F.  Concrete blocks are composed of cement, sand, and lightweight aggregate.  When exposed to fire, masonry does not burn, melt, twist or warp.

12. Job Data

13.  Each brick weighs 4.4 +/- lbs.

14. Job Data  Each brick weighs 4.4 +/- lbs.  Brick “Tongs” weigh 4 lbs. and carry normally 11 brick at a time. Normally two tongs of brick are carried at one time

15. Job Data  Each brick weighs 4.4 +/- lbs.  Brick “Tongs” weigh 4 lbs.  1 short wall = 3 mortarboards with 960 brick (4 high/2 deep).

16. Job Data  Each brick weighs 4.4 +/- lbs.  Brick “Tongs” weigh 4 lbs.  1 short wall = 3 mortarboards with 960 brick (4 high/2 deep).  Total weight of brick = 4224 lbs

17. Job Data  Mixing mortar = 70 lbs. Mortar mix, 18 shovels of sand & 5 gallons of water.  Each shovel of sand weighs approx. 6-8 lbs., total weight = 144 lbs.  Water weight = 41.65 lbs.  Total weight of mortar in wheelbarrow = 255 lbs.

18. Strength Data  Right finger 2 nd digit and thumb = 30  Left finger 2 nd digit and thumb = 27  Right hand @ 90 degrees = 130 lbs.  Right hand @ 180 degrees = 150 lbs.  Left hand @ 90 degrees = 160 lbs.  Left hand @ 180 degrees = 145 lbs.

19. Identification of Risk Factors

20. Static posture

21. Awkward postures

22. Static muscle loading

23. Contact Stress

24. Force of movements

25. Repetition

26. Environment

27. Static movement

28. Awkward posture/pivoting

29. Vibration

30. Questions???