Let's say I have an open patio and i put a 2% slope on it for drainage. When the owners place their furniture on it, will they complain that their table and chairs are tilted? Basically, how much slope is too much for a tabletop?
Sorry, I’m a little thrown off with the side friction. Is that the same as skin friction?
The terms look like (soil depth)^2 * (coef)^2 * (soil density) * 2 * X.
Did I get that right?
I too do not encroach the 5’ boundary to the building. I guess I’ve been lucky I’ve never been asked to design within the building. Or they all just thought ‘don’t even bother asking this guy’.
It’s not really my business but it seems like you folks are improving a road you use 2-3 times per week and the major benefactor will be the oil and logging companies that use the road every day to make money. I would think that these companies could pitch in to help with whatever additional...
Sorry, I’m struggling to follow. With the drain slope you mentioned, in 200’ it dropped ~4”, and you’re saying it’s already under ground?
I see the bottle neck might be problematic. Looks like you need to bring all the runoff from a 3-ac(?) site through a corridor that’s 30’ wide. You have...
Once you cut below the lowest point of your boundary, you’re infiltrating. I don’t see how you do this without infiltrating bc you have to limit your runoff. What about using permeable pavers (grass or bricks) as much as you can to keep your runoff coefficient as low as possible? Create a...
I would be thoughtful on how you bring up the issue. I’ve read stories about tenants getting evicted after complaining about something.
Most of what I follow for parking lot design are just guidelines. There minimum widths and things, but not much criteria on grades. ADA would govern slopes on...
I figured the rim of the catch basin would be at grade level. Is the surrounding grade higher all around? Then your CB is in a sump and the area will flood bc the underground chamber is full. If the surface has a slope to it and the CB is there to intercept some of the flow, then when the...
I'm not very good with posting pictures, but here goes:
The block isn't vertical 45deg out from the bend. The height of the block goes from the top of the bend to the bottom of the trench 6" below the pipe.
How do i calculate x such that the reaction block isn't compromised?
Assume thrust...
I’ve done quite a bit of estimating and it comes down to 2 things: what costs you money and what are those rates. RS Means compiles data to give you a general unit rate. The best data to use is your own. Go thru the job you want to bid and quantify every work element. Go thru all your previous...
Your catch basin might be in low point. So you have water trying to enter, but uh-oh, there’s no more room, so where will the water try to go next? How much flooding will there be before it finds another route? If that’s a problem you might need another outlet.
Where I see trenching costs really jump is when you need to bring in shoring. Not sure what your starting cover is, or when you need to shore, but you if start at 0.5m deep and ended at 1m you’d have 1% slope on that length, and that should suit you just fine. Is it possible to use slotted pipe...
What are you folks using for the allowable tensile stress of Class 150 ductile iron pipe?
Looking online I find 16,000 psi for A53 A pipe. Using the ASME B31.3 formula, an 8" ductile iron pipe has an allowable pressure of 1,500 psi. The pipe is only rated to 150 psi. I'm either missing...
