1 / 30

Masonry

Masonry. The history of Masonry dates back to the Egyptian Pyramids, the coliseum in Rome, and the Great Wall of China. Sun-baked clay bricks were used in the construction of buildings more than 6,000 years ago. The skill and precision of the mason can never be replaced by machines.

isla
Télécharger la présentation

Masonry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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.

  6. Job Data

  7. Job Data • Each brick weighs 4.4 +/- lbs.

  8. 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

  9. 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).

  10. 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

  11. 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.

  12. Strength Data • Right finger 2nd digit and thumb = 30 • Left finger 2nd 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.

  13. Identification of Risk Factors

  14. Static posture

  15. Awkward postures

  16. Static muscle loading

  17. Contact Stress

  18. Force of movements

  19. Repetition

  20. Environment

  21. Static movement

  22. Awkward posture/pivoting

  23. Vibration

  24. Questions???

More Related