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CMU Wall Embed Plates

CMU Wall Embed Plates

CMU Wall Embed Plates

(OP)
I'm reviewing calculations for perimeter cmu wall embed plates connecting a continuous angle to a roof deck.  The embed plates are designed to transfer lateral forces to the walls.  Each plate has one row of two headed stud anchors.  The equations used are the following:

Ap = Pix((Lbolt)^2) + 2(sqrt(2)xLbolt)xSpacing  

Tension:

B(A Masonry) = .5xApx(sqrt(f'm))

B (A Stud) = .2xAbxfy

Shear:

B (V Masonry) = 350^(1/4)x(sqrt(f'mxAb))

B (V Stud) = .12Avxfy

Does anyone recognize these equations and if so, can you please tell me what reference I should be using to check them?   

RE: CMU Wall Embed Plates

They're from ACI 530, Section 2.1.4.

RE: CMU Wall Embed Plates

They look much more basic in ACI 530, 2.1.4 dazed

RE: CMU Wall Embed Plates

(OP)
Thanks guys.  Now for Ap, do you know why he is using a two-part equation?  Obviously I see the pi(Lb)^2 form the ACI Code, but I still don't know where he is getting the 2(sqrt(2)xLb)xspacing from.  For a two-stud embed plate I think Ap would just be 2x(pi(Lb)^2) minus the projected overlapping area, if any.      

RE: CMU Wall Embed Plates

do you have ACI 530?
 

RE: CMU Wall Embed Plates

(OP)
Yes.  I am referencing the 2005 Edition.

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