Does anyone know where to find the seismic zone maps (I-V, I believe). I think they were in ASCE 7-02. I don't want to purchase ASCE 7-02 because I only need to look at the map once. Waste of money.
Does anyone know where I can find these online for free? I can find all sorts of more...
Hello,
I've seen some tower cranes spring up lately very quickly. I never been on a site that uses tower cranes and I'm curious how these are anchored into the ground. They always carry fairly heavy loads and they seem to be installed almost overnight.
What type of foundation system do they...
Hiya,
I don't know how I missed getting a full grasp on this in undergrad.
Obviously, I've googled/wiki'd and done some research online. My online research leads me to believe that this is some huge structure that allows people to enter and dig out the soil below.
My problem is that the...
I'm just fishing for some ideas. I'm looking into a way to remove 3-4 very large diesel generators from a steel building. The generators are going to be replaced and it is proving difficult to find a way to remove the old generators from the building.
There is one overhead door and there is a...
I have a question that can probably be answered rather simply by a structural engineer. I'm a civil engineer, however, I have little experience with structures. I'm fortunate enough to have been put on a job where the schedule is lax and I can get a bit of structures experience (albeit with...
Hello,
I'm assisting in the design of a foundation and tie-downs for a single-wide modular home. I've never done one of these and I'm wondering if anyone has any advice or could steer me to a good reference. I don't really know where to start. I don't even have a loading, so I need to come up...
What's the difference and how compatible are these different programs:
SWMM, HEC, Hydra, H20 Net SWMM, HEC-1, HEC-HMS, HEC-2, HEC-RAS, HY8
Why are there so many and what are they each used for?? The same thing?? Similar things?? Completely different things???
I've used HEC-RAS a little bit...
Hello,
This is probably a silly question, but I'll ask it anyway...nobody is around the office. What is a "rolled" fitting? I'm working in designing underground utilities and I have some mark-ups done by my supervisor. He told me to call out the rolled fittings....and I'm at a loss. It's...
Hello,
I'm wondering if anyone has a good reference for estimating costs on land development projects? Unfortunately, I've had poor mentors who were unable to provide insight into their cost estimating numbers. I used to have a large spreadsheet that broke out costs according to units...
Has anyone tried to get this lately from the NRCS? It's damn near impossible to download the old (or the new for that matter) TR-55 program from their website.
It's all setup via FTP, and I'm having a hell of a time downloading it via HTTP. I've changed all my security settings and it still...
I'm beginning to do earthwork calculations for site work. I'm performing the calculations on Terramodel and I was wondering about shrink/swell factors.
I typically just use 1.00 for the factors and compute a straight volume without factoring in shrink/swell. How are these shrink/swell factors...
This is a very silly question, but nobody is around to ask. What is meant by the haunches of a pipe? I've got to extend the pipe bedding to the haunches. Is it the centerline?
Hello,
I was wondering if anyone had any advice on calculating the flow into a submerged grate inlet. I'll be contacting the vendor shortly because I know the flowrate will be highly dependent on the grate geometry.
Basically, we're using a submerged grate inlet to act as a flow control for a...
Hello there,
Pardon my seeming lack of knowledge. I've been doing environmental work and I've been pulled onto my first road project so I have a lot of questions.
I was wondering if there's a universal way to call out aggregate? It seems there's millions of ways it's called out. For...
Hello all,
I was wondering how y'all go about sizing biaxial geogrid for roadway improvement. I'm designing an aggregate road and I'm going to be putting some biaxial geogrid between the aggregate and the subbase. How does one go about determining the exact product or sizing to use?
I'm sure...
I've been asked to determine a quantity of drain tiles needed for the construction of a large concrete pad. The project consists of the construction of a large concrete pad approximately 340' x 175' for storage.
Now, I'm not too familiar with drain tiles and I've never had to do any design...
I'm looking for the best culvert material to use in a specific application. The culvert will be running under a haul road that is basically a 2' thick aggregate road. The top of the culvert will only be covered by 18" to 24" of aggregate roadway surface at it's point of minimum cover. What...
I'm designing a construction road and I'd like tie-in to the existing grade at a slope steeper than 3:1. This road is on an industrial site and the side slopes won't need to be mowed. I was wondering if going to a 2:1 slope would present any problems beyond not being mowable. Would a 2:1...
Do these values incorporate the weight of a fully-loaded vehicles or are they just the empty vehicles.
For instance, the HS20-44 design vehicle has axle weights of 8kip, 32kip, and 32kip. Are these the axle weights for the fully loaded vehicle, or are these the axle weights for the empty vehicle?
OK, I tried to get some help on this question in another thread, but I could not.
I just need some feedback as to whether my estimation of ESALs makes sense or not.
I'm trying to determine the ESALs for an HS20-44 AASHTO loading. This truck has 3 axles, spaced 14' apart, with axle weights of...
