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Thanks civilperson. I found a reference that explains it, "Structural Steel Design" by Alan Williams. "Dmin" denotes the number of 1/16 inch in weld size. In other words, if Dmin = 2.56, then this means your minimum weld size to fully develop load "Ru" is 2.56/16, or rounding up, 3/16. Or if...

On page 4-21 of the Seismic Design Manual, there is a calc for the variable Dmin. The book reads as follows: "The minimum required single-sided fillet weld size is, Dmin=Ru/1.392kips/in(lw)=.784 Could someone tell me what this unitless value represents. Thanks in advance

Thanks everyone, Mike, I did ask him why. He didn't know. Whyun, Yes, you are correct. And I guess ultimately it really doesn't matter what factor they used. The relative "stiffness" to be applied to the shearwalls can be determined from the reciprocal of the deflections of the shearwalls. I...

I have noticed on some structural calculations that while the relative rigidity seems to be proportionate to the reciprocal of the deflection, the values seem to be multiplied times some factor. For instance, lets say the deflection is .5", then the relative ridgity would be 2. But on some...

How do you convert the shear deflection to relative rigidity?

I know with masonry shear walls you take the height divided by the depth plug the answer into a chart and get the R value. I also know that rigidity is the reciprocal of deflection. Is the rigidity of a wooden shearwall the reciprocal of the deflection? When designing wooden shear walls, how...

If anyone can recommend any reading material on this subject, I would really appreciate it.

THANKS CJ AND MIKE.

When a shear wall is perpendicular to truss spans, shear blocks are specified over the shear wall. Sometimes I will see on the plans, this line of shear blocking continue pass the point of where the shear wall ends. My question is: (1) Why is this done? (2) Why is flat 2x blocking sometimes...

Thanks for all the comments.

It clearly says "Connectors are not load rated." So basically you have to pretend like they are not there and have the truss repaired accordingly. Don't wait for someone to tell you what you want to hear. It isn't worth the risk.

Thanks RARSWC

JAE, That would make sense. That would explain the need for the adjusted shear formula. Thanks

THE 2005 NDS SECTION 3.4-7 SUBSECTION (C)(PAGE 17) STATES: "WHEN CONCEALED HANGERS ARE USED, THE ADJUSTED DESIGN SHEAR, Vr', SHALL BE CALCULATED BASED ON THE PROVISIONS IN 3.4.3.2 FOR NOTCHED BENDING MEMBERS. MY QUESTION IS, WHAT DO THEY MEAN BY CONCEALED HANGERS? THEY ARE NOT REFERRING TO...