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Thanks, ALL. We need to test the water pipe for 200 psi. The lateral pipe is smaller than main. is it because of lateral pipe experiencing higher pressure during testing and PVC can't take the pressure?

Hi, I am working for a contractor and entry level for roadway construction. I am curious why all specifications called out for copper pipes for all lateral, although the mains are PVC pipes. Please help me to better understand the piping construction. vty, YC

Hi HOKIE66: Starter wall about 2-3" and horizontal keyed joint with water stop. After pressure water wash, I may use expandable water stop or PVC. I am not sure yet. I am asking because at the bottom wall level, the concrete shrinkage could be managed well due to enough time between slab and...

Hi, I am working on new waste-water digester concrete tank construction. I am wondering if horizontal construction joints are allowed during the tank wall construction. It is 40ft diameter and 40 ft height circular shape concrete tank. I heard only vertical construction joints are permitted due...

I made some sketches to make my point clear. Attached file: Page one depicts concrete layouts of a portion of the structure, second page depicts individual reinforcement details from the contract drawings, and third page depicts another joint case. I asked EOR how to combined individual...

SECTION 03 20 00, 1.03http://files.engineering.com/getfile.aspx?folder=2b01dffd-989d-49fb-a794-2d41a1be00f1&file=JOINT-1.PNG

This job site is located within the states. AISC has the solution center to ask structural steel related questions. Do ACI have similar? Does anyone know how to contact ACI for the code interpretation questions?

Thanks JAE and Mike20793: I would like to share my RFI(BLUE) and EOR's response(RED). Please help me. All i want is the reinforcement details provided by the EOR, then we will generate SHOP drawings. We're stuck with EOR. Do you know where it says, the lap splice details and locations must be...

BA: Vertical movement was my original concern. you stated that there won't be any vertical movement. But thanks for helping me out.

BA: Top has embedded bolts as shown. Detail 3/ST323 attached. I am working for a contractor as the structural engineer. http://files.engineering.com/getfile.aspx?folder=b9b3ce1f-83b3-44c6-941b-234a1de8337e&file=steel_stair_support-2.PNG

BAretired: Completeness, attached the bearing details, the designer used. I appreciate your kind responses. http://files.engineering.com/getfile.aspx?folder=702f7cf4-3ccc-4e73-a7cf-a750e6032f05&file=steel_stair_support.PNG

BAretired: Thanks for your kind explanation. I think, your explanation is valid under the condition that bottom of stair will be perfectly level all the time. Am I right? While installing the stair, we may need steel shim plates to make it level. However, I think the bottom will constantly...

Bridgebuster: may i ask the direction of the keyed joint? Is it perpendicular to the web?

JAE: I got ACI 132R-14, and found useful information. Thank you so much for the information. The design engineer is claiming that ACI 132R-14 is not the part of ACI 318 and 315 (these two codes were only mentioned in the general notes). So, we cannot refer to ACI 132R-14. How can we relate ACI...

anyone has any steel stair design experience, please help me!

Thanks Bridgebuster! We are about to pour webs. May I ask "Bridgebuster" regarding the construction joint preparation you guys did for your boxes? We utilized the green-cutting(power wash, 3200 psi). Some area turned out to be a great joint with well exposed aggregates, but some area were not...

I have some questions about Diagonal Steel Stair bearing support configuration; fixed at the top and elastomeric bearing at the bottom. I am concerning about the elastomeric bearing pad won’t accommodate the vertical downward component of movement during the service life (Temp+LL+DL). (Due to...

My question is regarding single cell Box Girder Bridge Construction, Horizontal Cold Joints between webs and slabs. Questions: The client approved cold joint locations at between bottom/top webs and bottom/top slab, respectively. 1. Does that mean the client approved the visible cold joints...

I am currently involved in a Transit Rail Station construction project. This is a Design-Bid-Build project. We are having many reinforcement detail issues with the designer, especially, regarding missing highly congested concrete joint reinforcing details. The design drawings do provide...