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Hi All, I see there have been several threads on this already but do not seem to answer our specific question. We have a low rise building < 15m using a system that has low ductility. As such we are permitted to use tension only bracing and no strict capacity design (CSA S16 conventional...

Hi All, We have a project where the contractor elected to pour concrete well past the time allowed for in the specifications. My understanding is the concrete was starting to get a little difficult to place (after 2 hours ) and the contractor added some water and then continued to place the...

Hi all, We are designing a steel building structure for and industrial facility. The key industrial process requires moving large amounts of water through open troughs. These troughs must be kept out of the direct light without adding rain so we need to provide rain weather shield. Not a full...

Hi All, Thanks for the initial comments These are continuous concrete beams only, no R/C slab between them. There is a pair of them that supports a small crane that rolls on a rail above the beams. The load is applied from the crane in a couple of specific locations to pick specific items up...

Hi All, I am working on an old building retrofit. The building was built in the 1940s of R/C, and the beams I have a question about are 12" wide and 24" deep. They are continuous beams with three bottom bars that lap at the supports and three top bars the are only over the columns. The beams do...

Hi GC_Hopi, Thanks very much for this! The only reason we have not yet recommended the seal be applied to the gate, is that any gate steel work is not a part of the currently proposed project. They intent to re-coat in a coupl eyears time, so adding the steel scope of adding a seal changes...

Hi All, Yes, we have spoken with many seal manufactures and they all say " we can build what ever you want" but very little idea on how to do a seal mounted in the concrete and not oin the gate itself. The gates are very old and are in good condition and not being replaced as a part of the...

Hi All, This might not be the right section, however we are Structural and this problem falls on us for this project! We are working on a project where a very old Dam and spillway requires the ogee concrete surface of the spillway to be repaired and replaced. Currently the radial gate that...

Thanks I will look through this.

Hi All, I am working on the foundation design for and elevated building module in the Arctic of North America. As a result, to protect the permafrost, the building needs to be elevated a few feet (+/- 3') above the ground. When doing this we have created a space that can have wind under the...

Hello, I am working on an assessment of an old structure and elevated water tank, it looks like it was designed in the late 1920's and built in 1930's (before 1931). The fabrication of the structure appear to have been by Horton Steel in Ontario Canada. I am looking to try and determine the...

Saplanti, That is a good idea, I can take a look and see what they have provided. Typically we find that the turbine suppliers do not check the transient pressures associated with a catastrophic failure of their equipment (they always claim that never happens, however there is recorded...

Hi All, Thank you again for your help and opinions. I am looking into it a bit further but at this stage, I will be sizing the flanges (for initial budget pricing) based on the Emergency pressure as part of the maximum working pressure. This will put me in the 600# range, pretty high, and once...

Thanks for the info so far. A couple of clarifications. We design the transmission piping using AWWA M11 and ASCE No. 79 which are guideline used for penstock design. Not strictly a code like some of the pressure and process piping codes noted above but covers lots of detailed information. When...

Hello All, I am looking for some info on what the surge capacity is for a ASME B16.47 flange. We are designing a high pressure piping system for a hydro plant, typically when the pressure is this high (6000 kPa) we only use CJP welded steel pipe. I have a situation where the client is asking...

The plate grade is 350W, i think this is 50W is the US? We are designing the structural capacity of this weld now, and we are leaning towards a partial penetration groove weld on ether side of the plate plus a fillet weld on each side. The process is typically designed by the contractors...

Hi, We are doing the structural design along a very large Clevis that needs to attach a large tension load to a concrete structure. For construcatibitly the clevis needs to be bolted onto the face of the concrete. Anchoring to the concrete is not an issue using quite large dywidag anchor bars...

we Want to use steel for the durability and much easier to connect too. Foam fill is typical for floats as an insurance policy so the do not spring a leak and sink. I agree we should be getting the right product but it was a request from the contractor to the owner and we need to outlay the...

Thanks everyone. We have gone back to our client and suggested a forged steel equivalent. If the contractor still has to use the cheaper malleable iron fitting then we have asked for the welding procedure to be specifically designed by the fabricators welding engineer to ensure the right...

Thank you everyone! Our plan is to fill with billet foam first and only use some expanding foam where required. Good point on the expansion pressure, we will make sure there is an air release. The ASTM A197 is malleable iron and requested by our fabricator. The pipe itself has almost no load...