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Thanks guys.

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?

The application around the pile head is actually a pvc type material with adhesive and a spray membrane over it.

pile head treatment.

@Motorcity I should say pile treatment.

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?

@BAretired Encasement or covering of the tendons with suitable mortar will be done only after the stressing is done, for protection and for fireproofing purposes. Tendons are laid crossing in existing slab with around half laid on top and the other half laid under or soffit of slab. At both...

@Ingenuity Thank you for your response. The tendons actually laid crossing the existing slab section which around half of the length exposed on top and the other half exposed under the slab or soffit. Concrete cutting done by 25mm depth at driveway to concealed and protect the tendons with...

@ jdcollins Thank you for your response. In fact, stressing report is required for project record.

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...

@ retired13 @ hardbutmild @ KootK Thank you for your informative replies.

@ hoshang. Thanks for the info. I have also read that article before but I want to know if, links are still required even if there is no seismic consideration in the design? But for additional info, I have attached herein the reinforcement detail...

@ hardbutmild. Yes hokie66 is correct. Here in middle east they normally use the term LIFT instead of ELEVATOR. @ retired13. To my understanding, no seismic consideration. However, please clarify if S link is required only for seismic? @ KootK. Thanks for you insight.

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

Thank you all for your responses. So far, I can use implement RCSC section 8.2 as per discussed by darthsoilsguy2 and dauwerda but only on pretensioned or preloaded bolts.

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.