double tee/ wall connection detail

This is a one story warehouse box building type. that is 24'-0" high.

First question is...

Is it required to have a tie beam on top of a REINFORCED MASONRY wall, where the precast double-tees are running parallel to the wall?

These walls are designed to resist wind loads mainly.
second question is....

Is a bond beam enough in lieu of the tie beam and if so, what would the connection be like with the edge of the double-tee that is running parallel to the bond beam?

Thank you.

 

[Howdy]

no you do not have to have a tie beam or a bond beam either.
what we do here, we use a steel angle with expansion anchor bolts to connect the top of the masonry wall to the underside of double tee flange. as far as the reinforced masonry wall we design it to resist out of plane wind loads (mainly suction) and in plane shear as a shear wall to transfer the roof diaphram shear. we typically use #6 at 32" o.c. in filled cells for the wall and the expansion bolts at 24" o.c.

hope this will help.

 

[DTW]

Howdy

I am very surprized to hear that you use expansion bolts in hollow masonry block!!!

how do you make that work?

 

[jheidt2543]

Howdy,

Every detail I've ever seen with a steel angle and expansion bolts at a wall top, have the bolts set or drilled into a bond beam. How else could to hold them in place and accept the load from the precast?

I also think you will find that building codes have lateral stability requirements for masonry walls that relate the wall thickness to the wall height and require either vertical core filling or a bond beam.

 

[JedClampett]

If you're in Zone 2 or higher, you are required to have bond beams "continuously at structurally connected roof and floor levels..." See UBC 2106.1.12.3.

 

[Howdy]

thanks jedclampett
I am in south florida in a high velosity huricane zone.