Masonry design

[BAGW]

Hello everyone,

I am trying to use table 2.2.3.2 for calculating the flexural tensile stresses in masonry. What does tensile stress normal to bed joint and parallel to bed joint mean? Could you provide examples for both these cases? For most cases wouldn't it be normal to bed joint?
Also what is vertical/horizontal cross section of a mosonry wall? Is it wall spanning vertcally or horizontally? When to use vertical wall section properties as compared to horizontal wall section properties?

These questions might seem very basic stuff. I am new to masonry and trying to understand some of these notations. Thanks

 

[JAE]

Please clarify what document you are referring to.

Check out Eng-Tips Forum's Policies here:
faq731-376

 

[JAE]

Tensile strength normal to bed joint: A bed joint is the horizontal joints in a masonry wall so stress normal to that would be vertically oriented stress such as found when a wall spans vertically from bottom to top and bends out of plane (bending about a horizontal axis when the axis is parallel to the overall wall.

Parallel to bed joint tensile stress is when a wall bends out of plane in a horizontal fashion about a vertical axis when the axis is in the plane of the wall.



Check out Eng-Tips Forum's Policies here:
faq731-376

 

[Guastavino]

What JAE said. And JAE, I believe they are referring to the MSJC/TMS code for the U.S.

You use the properties for vertical/horizontal based on the way the wall is designed. IE, where is it braced. If a wall spans between pilasters, or if it spans top to bottom, etc.

 

[BAGW]

It's US MSJC ACI 530