I got a set of foundation drawings for a prefab building from a prospective client. They said these drawings are from very good but pricey engineer, they want me to design foundations for other similar buildings. I started to review these drawings and found lots of mistakes and other items I...
I am looking at the design of a billboard foundation. The pad portion has two layers of reinforcement, top and bottom. The foundation is subjected to high moment. Can someone explain me why do we need top pad reinforcement? sketch is attached.
I have a tower pipe leg, reinforced with a single angle welded along its length. The reinforcement changes the centroid of the new reinf. leg and thus creates a load eccentricity. When a uplift load is applied to the leg, that extra eccentricity creates an additional moment that has to be taken...
I have a laminated wood pole, that is subjected to a moment at its base, compression load is minimal. Does Section 3.9.2 of NDS 2005 Edition applies to wooden poles. Please see a copy of the NDS code. Is this equation for stability or member strength?
I am analyzing a guyed tower that rest on a 6' diameter by 50' deep drilled caisson. The major forces applied to the foundation is the down force and some minor shear force. The pier has only (18) #6 bars, which is not even close to 0.5% required by ACI, but since there is virtually no moment in...
I am working on the foundation reinforcement design that currently has a few rock anchors holding it in place, we need to add more micropiles (3" dia. DYWIDAG 150ksi bar). The original foundation drawing is pretty vague and does not have specs shown for the anchor rocks or the grout used...
I am working on a design of a transformer foundation. Transformer contains 1050Gal of oil. That is quite a bit of oil, that would require 146 cu. ft. of containment volume around the transformer pedestal, if I add crushed stone into the pit, it will quadruple the volume.
I have an option of...
Per D.6.2.1(b) shear force perpendicular to the edge on group of anchors is Vcbg = Avc/Avco*(********)Vb
where Avco is the projected area for a single anchor in a deep member with a distance from edges equal or greater that 1.5Ca1 in the direction perpendicular to the shear fore...
I have a 106' tall by 32.5' diameter tank. It has a hopper that starts at 50' elevation and goes down 23' and has a 7' diameter opening. The tank has 22 W-shape columns that extend only up to the elevation of 80'. the thickness of the tank plate is 3/16" from top to about 80' and than it...
