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commentaire ID

281

Commentant au nom de

Individuel

État du commentaire

Under 910.04.02.02 Post-Tensioning Working Drawings, I suggest that is be made clear that the details for the ducts must include the appropriate friction and wobble coefficients to be used in the design calculations. Read more

commentaire ID

285

Commentant au nom de

Tensacciai srl (TENSA)

État du commentaire

See attached file. Comments are: - use of word "couplers" - request of use of ETAG 013 for dynamic testing - use of curvature radii for ducts smaller than 10 m - use of FIB Bulletin 75 not connected with ETAG 013 - use of corrugated plastic ducts with longitudinal flow channels Read more

commentaire ID

288

Commentant au nom de

VSL

État du commentaire

910.02 References: ETAG 013- Obsolete. It has been replaced by EAD 160004-00-0301 Post-tensioning systems for prestressing of structures. Also EAD 16007-00-0301 Special filling products for post-tensioning kits has been issued

commentaire ID

289

Commentant au nom de

VSL

État du commentaire

910.04.01.01 “induced slip requirement” -what does “induced slip requirement” refer to? Does it mean “wedge draw-in”? if so, it is system-dependant and covered on each system ETA or equivalent

commentaire ID

290

Commentant au nom de

VSL

État du commentaire

910.04.02.02 “where posttensioning tendons are anchored on concrete…” Only passive anchorages based on concrete embedded bulbs are considered. Other passive anchorages typologies (i.e. Anchor head + wedges + cap; i.e. anchor head + compression fitting + cap; others…) Read more

commentaire ID

292

Commentant au nom de

VSL

État du commentaire

910.04.02.04.02 Testing “unless the anchorage is located or used in such a manner that repeated load applications could be expected on the anchorage.” - Who decides if the anchorage is subject to dynamic loads? - Can previous representative tests used to justify the requirements? Read more

commentaire ID

293

Commentant au nom de

VSL

État du commentaire

910.04.04.05 “Mill test certificates for prestressing bars…” strand is missing. We propose to use “main tensile element” instead (as in other documents, such as FiB)

commentaire ID

294

Commentant au nom de

VSL

État du commentaire

910.04.02.08 Corrosion inhibitor Vapour phase corrosion inhibitors (VPCI) are banned in Florida. Some studies of failed tendons were linked to the VPCI's poor dispersive properties and non-uniform protection. Read more

commentaire ID

295

Commentant au nom de

VSL

État du commentaire

910.05.01.01 “when anchorages and couplers for PT are tested in an unbonded condition” we are not aware of any testing procedure that tests PT in a grouted condition. - No requirement on elongation? Only on force? Read more

commentaire ID

296

Commentant au nom de

VSL

État du commentaire

910.01.02.01 “The ducts, including joints, shall be watertight, vapour-tight and nonreactive with concrete, tendons, or grout. The ducts and components shall meet the requirements of Post-Tensioning System Tendon Protection Level 2 (PL-2) according to PTI/ASBI M50.3” Read more

commentaire ID

297

Commentant au nom de

VSL

État du commentaire

910.05.02.02 “Plastic for the external post tensioning ducts shall be code letter D or E for colour and ultraviolet (UV) stabilizer according to ASTM D3350. The plastic duct shall be manufactured according to ASTM D2239 from virgin material.” Read more

commentaire ID

298

Commentant au nom de

VSL

État du commentaire

910.05.02.03 “Ducts at Deviators Ducts within a deviator for post-tensioning tendons shall be galvanized steel pipe according to ASTM A53,Type E, Grade B, with a wall thickness of not less than 3 mm. The duct shall be formed to conform to the alignment of the tendon.” Read more

commentaire ID

300

Commentant au nom de

VSL

État du commentaire

910.05.05.02 Vapour phase corrosion inhibitors (VPCI) are banned in Florida. Some studies of failed tendons were linked to the VPCI's poor dispersive properties and non-uniform protection. Soluble oil corrosion protection products are recommended, and of widespread use around the industry

commentaire ID

301

Commentant au nom de

VSL

État du commentaire

910.06.04 “Each gauge shall be capable of indicating forces directly in Newtons or be accompanied by a conversion chart so that the imperial readings can be converted into Newtons” Read more

commentaire ID

303

Commentant au nom de

VSL

État du commentaire

910.07.03 Vapour phase corrosion inhibitors (VPCI) are banned in Florida. Some studies of failed tendons were linked to the VPCI's poor dispersive properties and non-uniform protection. Soluble oil corrosion protection products are recommended, and of widespread use around the industry Read more