Concrete and Masonry Equipment and Tools

Concrete and Masonry Equipment and Tools.

Concrete and Masonry Equipment and Tools

The masonry wall in the photo is 12 feet high. The wall is braced on one side only. The braces are anchored to the wall 8 feet from the base. The braces are anchored to the ground 6 feet from the base of the wall. The braces are spaced 10 feet apart horizontally.

a. Where would the restricted zone be for this wall? How would you mark the restricted zone? When can you remove the restricted zone?

b. What is the minimum wind load pressure (psf) recommended by ANSI A10.9-1983 for design of the bracing?

c. What is the total force in one of the braces at a wind pressure of 20 psf? What vertical uplift capacity must the ground anchorage have to prevent the wall from being blown over? Draw a free body diagram and show calculations to support your answer.

2. Write a multiple choice test question on Subpart R – Steel Erection. The question must have at least 4 choices.

3. Research an accident involving Concrete/Masonry or Steel Erection. Write a 200 word description of the accident and describe safety measures that would have prevented the accident.

Concrete and Masonry Equipment and Tools