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Pipes suspended on bridges or exposed pipes can be subjected to significant stresses as literature shows This work by University of Calgary and TC Energy demonstrate that" Dynamic Stress Analysis of Exposed Pipes Subjected to a Moving In-Line Inspection Tool " Another work " The study of the...

Hello everyone Can anyone provide guidance materials on estimating pipe dynamic stresses caused by ILI inspection pig tool . This is in relation to an exposed pipe installed on aerial bridge crossing, Thanks

Thx EireChch 50000 pounds over 2 foot by 2 foot concert pad, resulting in contact pressure of 100 psi

Hello i am looking for a source providing friction angle of road base materials ( typically Mulch gravelly sand 19 mm compacted to 95 % modified proctor destiny ). i am assuming that we are talking above 40 degree as a minimum ? Thank you

Ron.. Yes the fully loaded trailer will be sitting idle on the pavement and from the configuration i could see that the worst loading was not the the wheel but a pad (one foot by one foot) that will be loaded with 50000 pounds.

thanx oldestguy ..please note that the contact pressure may be the same as what we see under heavy wheel truck but the contact area here is almost double ( the magnitude of the load is almost double)

Actually.. i am more concerned about the bearing capacity and deflection under the heavy trailer load ( which is supposed to be very occasional). Load repetitions from the trailer or other traffic should be very small sine this is only short term ( couple years ) road. Hope i did not miss...

Thanx EireChch . Temporary surface heavy wheel load (250 kn) over s small concrete or steel pad with 0.6 m width and length. Just wanted to make sure that bearing capacity of square footing is applicable to small footings but it seems to be no problem.

Hello i have a small square pad to carry high concentrated temporary loading on a road surface. i am just approaching this as a foundation problem . i was wondering if there is any minimum requirement for foundation width (B) when using the traditional bearing capacity formula, at least...

Hello folks i was checking if a road segment recently built can carry the loading of a temporary trailer (100000 pounds) without problems. The road is : Asphalt concert layer over granular base layer and sandy Subgrade materials both compacted to min of 95% Modified Proctor. From the...

In CSAZ662 Commentary part it is stated " it is common industry practice to use –5 °C as the minimum design temperature for buried piping and either –30 °C or –45 °C (depending on the local climate) as the minimum design temperature for above-ground piping" . I think that this practice is not...

Thanks LittleInch ..for your thought on this ..We are talking here about Gas-distribution&transmission (not process or oil pipeline) ..for buried pipelines we are looking at min temperature range ( 0 to -15) depending on the area (north or south) .since ground is involved, heat-transfer...

oldestguy , thanks for your good thoughts

Maybe option 3 cant be done as it may cause significant delay of the project

Of course, safety should be number one ( over cost) one of the points of the question above : will assigning a conservative value of the minimum design temperature (could be by 5 to 10 C only) have significant cost increase, or welding or materials qualification (toughnesss), purchasing...

Piping codes (CSAZ662 , B31.3 , B31.4, B31.8) requires that minimum design temperature is assigned carefully in the design. (e.g CSAZ662, Lowest expected metal temperature during pressure testing and service under design conditions) My question is what is on the implication of using inaccurate...

Hello, I thought that this could be interesting problem to share. A utility trench (almost 50 m long) with depth of 2 m is proposed at horizontal offset of 2 - 3 m from a wall of 3 storeys house . Unfortunately, the wall has been reported to have cracks due to both structural issues and...