Bondy (Technical Paper, PTI Journal, December 2012).The vast majority of post-tensioning tendons used in two-way post-tensioned slabs have been unbonded.Unbonded tendons offer unique structural advantages not found in bonded tendons.The most significant of these advantages is post-flexural catenary capacity.
I called one of my resources for answers to these questions.
Leed y postesado en edificación.Certificados de sostenibilidad y hormigón.Minimal obstruction by column brief history of time hawking pdf longitudinal bars which makes possible to keep atleast two cables passing through column which is a part of integrity reinforcement requirement.On a side note, depending on the height of the building, you may need to reference nfpa 20 Chapter.Conduit and raceways are to be installed as per nfpa.Much of the MC cable was used for flexibility.I.org/10.3989/ic.10.082 (21) Payá-Zaforteza., Yepes,., Hospitaler,., González-Vidosa,.
Tests have shown that slabs with unbonded tendons possess catenary capacities three to four times the demand at factored load.In a typical case, the bonded steel will fail in tension before the concrete crushes and the catenary capacity will be lost.A failure at one point in a fully bonded tendon results in the loss of pre-stress force for only a development length on either side of the failure pointa total distance of 6 to 7ft for.5.The raceways had to be in the middle two-thirds of the pour as directed by the Architectural and Structural Plans.Raceways are being installed both underfloor and overhead for the distribution system.The number of runs allowed in the area of the structural web or beam are limited due to the structural integrity (refer to structural drawings and specification).PVC conduits floated up and one full layer was exposed above finished floor. Primary conduit installation ready for concrete encasement.The lightning protection system was connected to the common grounding electrode conductor via the exothermic welding process.