I have to design my first irregular diaphragm and have been going through Terry Malone's example in "The Analysis of Irregular Shaped Diaphragms" from WoodWorks. (Attached)
I think I am getting it. Seems like a series of FBD's and superimposing them(?).
The thing I don't get is where the 20'...
In ASCE 7 the figures show a uniform suction on the leeward walls.
It feels like this is a simplification and the suction would tend toward to 0 at the middle of the wall length (and mid-height for wind over the roof).
Does this make sense or is the suction really uniform over the length of...
Two questions for detailing construction of shear walls:
The edge nail spacing is tight (2 or 3 inches) so at a panel joint 2 studs are used with each panel attaching to its own stud. Are the studs connected? It seems like this would be slip plane if not. What force is used to design the...
I am designing a shear wall and want the weight of concrete foundation to resist the uplift. I am thinking LRFD might work better than ASD - 0.9D+1.0W vs. 0.6D+0.6W.
But if I use LRFD what would the phi factor for uplift be? (The equivalent to phi = 0.9 for a beam using 1.2D+1.6L). For ASD, is...
I have been modeling restrained retaining walls in EnerCalc with the attached geometry. (I hope I uploaded the figures correctly.)
EnerCalc has two options - one where the wall is pinned-pinned and another where the wall is fixed-pinned (fixed at the footing).
When I run the model as...
I am putting together a reinforcement schedule for residential foundation walls. I decided to check my designs against the tables in ACI 332 to see if I needed to do my own calculations or just use ACI 332. I have checked several entries on Table 8.2.1.3d for 3000 psi concrete and 60000 psi...
I am designing single plate shear connections and wonder if there is a rule for the minimum length of the plate vs beam depth.
For example a 2 bolt connection may have adequate capacity to support a W16 beam but the plate is only 5 1/2" long or about 1/3 of the 16" beam depth. Is that...
I am doing residential wood design for a project in another state and am trying to find out what species and grade of wood is typically stocked and sold to contractors.
Is there a survey or something that lists this? (I think AISC does a survey to find out what grades and shapes of steel are...
I often have to design residential basement concrete walls that are taller than 10 feet.
The way I read the IRC and ACI 332, those codes only apply to walls less than 10 feet and ACI 318 has to be used if the wall is taller.
ACI 318 has minimum reinforcement requirements for both vertical and...
