I have an 8-foot deep sanitary manhole that was installed by a contractor that was unfortunately installed out-of-plumb. I am unable to find any standards or tolerances for manhole 'plumbness'. Does anyone know how far out-of-plumb is too much for a manhole? Thanks in advance for replies.
I have a municipal splashpad project - an oval shaped concrete slab, 6-inches thick. The dimensions of the splashpad are: inner oval (with splashpad jets and lights) is 34' x 42'; and the surrounding oval is 60' x 100'. Does anyone know of any guides or resources to help determine jointing...
The 1x6 overlap on the bottom chord refers to the bottom chord splice - there are 1x6's nailed on each side of the 2x6 bottom chord members. The 2x6's are butted end to end at the center of the span.
There should not be much wind loading, as the site is surrounded (three sides) by trees that...
Well, after reading through all the comments and replies, I don't know if I should invest anything into a finished interior or not. Maybe I should not store anything in there over winter, as it sounds like the roof could collapse with moderate snow.
The consensus appears to be that the trusses...
Thanks again for the replies and continued interest. Here's more info:
The location of the shed is central Wisconsin, and snow loading is a concern.
Presently, there's no blocking between the 2x4 purlins.
The peak joint of each truss is secured by a (nailed) 2x6 'gusset plate' on one side only...
Per KootK's questions:
1. I am not a Structural Engineer. I do not see any signs of distress.
2. Agreed.
3. Doubling members is not my preference, due to cost and effort.
4. At the heel joint, where the top chord meets the bottom chord, this joint is also side-by-side (overlap). The 2x10 top...
Thanks for the reply.
The truss members are not in the same plane (no gusset plates) - they are side-by-side (overlapped) and are nailed together. Sample photo attached.http://files.engineering.com/getfile.aspx?folder=4ceb688f-2fb0-4f6d-8f97-0a2271b00697&file=20170324_132422.jpg
I recently purchased a 30' x 40' (unfinished) pole shed, and I would like to add a ceiling and insulate it (along with the perimeter walls). The shed was built (in approx. 1990) with 6x6 posts spaced 8' apart, with wood trusses (spanning the 30' width) attached to the posts. The trusses are...
Thanks for the replies.
There has not been an accident involving a pedestrian yet, so I guess this falls into the 'perceived safety issue' category, but there have been near misses. The real safety issue involves the number of lanes to be crossed. With two lanes of traffic for each direction...
I am looking for suggestions to improve pedestrian safety at an unsignalized intersection. The street to be crossed is a 4-lane urban street, 25 mph speed limit. The street was reconstructed 8 years ago and includes curb extensions/bump-outs, safety islands in the center (with in-street ped...
I'm searching for a simple design for the 'decanting' of sewer cleaning truck (Vactor) solids. We'd like to dump the Vactor solids onto a containment pad (similar to a concrete slab with curb & gutter around three sides), let the solids sit for a bit, while draining the liquid run-off into the...
We recently resolved the issue - decided to excavate the deflected pipe and 'cap' it to prevent further deflection and improve the load bearing. We found the contractor used excessive compaction force which caused the pipe to deflect. With clear stone bedding/cover, groundwater can flow along...
Our spec required clear crushed stone 1/2-inch minus as bedding (6-inches below) and cover (24-inches above) with a 12-inch sidewall clearance. The stone was hand tamped at the pipe's springline and plate compacted at 12-inches and 24-inches above the pipe. Native clay/silt soils above the...
A developer recently installed a new section of sanitary sewer in our City. On one segment of 8-inch PVC sewer (8-feet deep), the pipe has failed a deflection test (5% mandrel gets stuck). We televised the pipe and it looks good, other than a few scratches due to repeated mandrel pulling...
Our City has many sanitary sewers consisting of concrete pipes. This pipe material was commonly installed between approximately 1950 and 1970. As these concrete pipes age, hydrogen sulfide attacks the wall surface and deteriorates the pipe from the inside, mostly above the water line.
My...
Thanks for all of the replies.
Regarding the need for a curve or 'kink'in the horizontal alignment, the sewer will be installed across private property, in easement. The property owner has imposed restrictions regarding locations of these sewer segments and manholes.
The angle between the...
