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Is there a rule of thumb if geotech report is 10 yrs old or whatever, it's not reliable anymore? Assuming no fill is added or any other soil modification.

I can't find this on ASCE website "An ASCE manual [3-26] on the side effects of dewatering discusses settlement, how its potential can be evaluated, and measures to prevent it."

Any good recommendation about this topic. I'm googling this topic also. I have an excavation that is about 15w'x15L'x10 deep. Dewatering is installed (pipes with pump) to keep water level at bottom of excavation. Water level normally at 4'. There are foundations and structures around the...

I have a modified chainlink fence (long story why it looks like this, attached). The bottom of gate is 6' above. I need to verify if the hinge will not lose friction/clamp force after several years outside. I don't what the gate to fall and hit someone. Do you think the hinge I'll be using...

Anyone got a recommendation how to lock a chainlink fence gate hinge at 90 degrees. Our standard gate hinge opens at 180 degrees or 270 degrees. The hinge does not have to lock, as long as I can lock the gate at 90 degrees. Maybe an extra hinge or lock that I can add to the gate or a...

I've been asked to do a pre-construction checklist for a site grading/preparation project inside a refinery plant. I've been looking online but can't find a good goby. I'm doing a list of things/activities that needs to be looked at and "checked" before doing construction. Anyone got a goby?

I have an existing elevated slab, 1'-3" thick with reinforcement top and bottom. I'll be drilling numerous holes for threaded rod hilti epoxied to connect structures (not heavy) on top of it. I'm not concerned about load/bending stress, I'm more concerned about the effects of drilling numerous...

I have Roarks but not sure what formula to use for this case or how to approach this. Can I assume fixed 4 sides and just calculate the plate thickness but how do I check the stack/cylinder thickness and/or their composite action with plate...

If i need to cut 2 ft of stack strake from an existing stack, how does this affect the vortex shredding check.

I have 4 steel wheels (with brakes) supporting a structure that will be sitting on slab most of the time (years). Each wheel will have 2500 lbs load vertical. Since steel wheel is circular how do I calculate it's bearing area to make sure it's below concrete bearing strength.

I represent the client (I work inside a plant) and I review civil drawings for approval. These drawings and calculations are done by consulting engineers. What is this note again to lessen client liability when you "review" drawings but not really "approve" it. I don't even get the calculation...

I've seen these terms interchanged a lot. I'm looking for the correct meaning or differences between the two.

I have a lot of spreadsheet for connections but don't have much using Mathcad. Do you have a link where I can download free connection design using Mathcad?

Are these considered disimilar steel? I know stainless cant be touching galvanized steel

I have a pump foundation (just a rectangular block) due to old age has many cracks and damaged surfaces and corners. How do I determine if this is crack is still fixable by injecting epoxy or need to be replaced. Also what epoxy can I use so pump will not have down time.

I'm field welding a WF beam to an an existing column flange. I need the beam to have as little deflection as possible. I'm thinking of putting a stiffener at the bottom because it's only 2' long. Is there a reference calculation regarding this type of moment connection...

I have a tank that will be pulled off horizontally. Contractor will put pipes at the bottom so it's easier to pull it. The tank will come with shipping brackets by manufacturer so lifting up is not my scope. But once inside the plant, they will need to pull this to its exact location because...

I have an existing rectangular manifold. Think of it as a pipe but rectangular and very big 8'x3' cross section (see sketch). It's 50' in length and connected by flanges (splices). The support of this manifold needs to be removed temporarily and will be put back in later. I need to temporarily...

Any reference on this that you can recommend. Or you can just say what are the dos and don'ts. I have an existing steel beam, rusting and have holes due to rust. It's currently under load. I'm not looking for calculation reference. Can i weld on existing rusting beam or should it have it...

I have a modular structure that is 14' high that will be lifted regularly. It will have lifting lugs at the top. Maintenance requested a permanent ladder and platform at the top for rigging purposes only. Instead of them bringing extended ladder every time rhey need to lift this structure. If...