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Hi, May I ask if anyone can share a reference for tolerances in concrete piles installation such as tolerance in diameter, cut-off level, deviation from pile center, etc.? Regards,

Hi, may I ask a code related to this topic, vibration by jackhammer of any machine. thread507-345501

Hi, I'm in a project where the Specs. required 3 lab. tests on mechanical couplers, can anyone share me a clause in a code stating what are the 3 tests required for mechanical couplers except for tension test?

May I ask of how important is the effectiveness of waterproofing in pile heads of bridge pile cap? What can it cause to the pile in worst case?

Hi, May I ask to experts in post-tension works regarding quality assurance. There is a situation in our project that I require the contractor to provide me a stressing report of stressing external tendons. And they replied that stressing report not applicable for external PT. Can anyone please...

Hi Experts, We have this situation at our project site due to strengthening requirement of the building, external post-tension system is used as one of the strengthening systems. But there is a case that the tendons laid along the top of the driveway, refer to attached photo. What suitable...

Hi, In design drawings, the designer did not specify s-shaped links inside inner and outer vertical rebars. That, I have doubt if these links should be required in site installation. May I ask to the experts in core wall design, the importance of s-shaped links to be tied in between inner and...

Hi experts, What certifying international agency, certifying qualified company for strengthening/retroffiting works in concrete buildings? ABA102

I just want to seek any clarification or actual requirement from a code regarding on which side (nut or bolt head)should be as turned when performing bolt tightening. Is there a big difference on accuracy of specified torque value when toque is applied on bolt head rather than on nut.

Hi, May I ask your help for your assessment on rusting stainless steel pins of retractable roof. Rusts were already removed but keep on showing up. Photo attached on current appearance. Very high humidity in our environment has a great factor for this rusting but may I your expertise on how to...

Hi structural experts, Is there any adverse effect on pin connection shown on attached photo w/ big gap between pipe lug surface and pin cap.

Hi Experts, How the torque value of nuts in connection affects the design of the connection of that connection? Can you please share also the proper way to calculate the toque value of certain bolt size or else manufacturer's recommended torque value can be reliable?

Hi, In our project with huge steel structure trusses, upon inspection I have noticed a small in between flange of joint connection which is a slip-critical connection. Is there an allowable gap to a slip-critical joint. Please state what code.

Hi, We have a situation on our project involved with steel structure. The Contractor used a not fully threaded anchor bolts with threads at the ends to anchor the base plates of the steel structure only instead a fully threaded as specified by the design. Is there a big difference or any impact...

Hi Geotechnical experts, We have a situation on our site that we suspected the actual height of pile is not as per the design. The integrity test report was submitted but doesn't specify that the height was actually checked other than the integrity of the piles. I have searched that there is a...

We have this situation on site that the contractor has installed longer bolts than required due to unavailability of the bolts in the market. That they added additional washers up to 3 washers just not to exposed the unthreaded shank when tightened. Is there a code limiting the number of washers...

Due to site condition the original arrangement of bars in concrete beam of one layer of 10T32 has been rearranged to 2 layers of 5T32. Is there a big impact in section capacity of the beam?

In steel structure part of our stadium project, the designer required anchor bolts of fully threaded. However, the contractor procured anchor bolts which are threaded at the ends only. So, they wrap the anchor bolts with denso tape along the unthreaded portion. They are using this procedure of...

Can a snug be assigned with definite value of torque?

Hello Structural Engineers, May I ask, if is there a standard requirement regulating the location of welded splice on steel beam either rolled section or built up section?