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SCREEN TUBES WITH POST INSTALLED ADHESIVE ANCHORS

Posted by NIKalmost 4 years ago
SCREEN TUBES WITH POST INSTALLED ADHESIVE ANCHORS

I was of the opinion that Post-installed adhesive anchors are provided with screen tubes to prevent concrete from spalling in concrete bases and to hold the adhesive in place for hollow masonry applications. Is there a need for it in Precast wall applications? Is there a requirement that precast paneled wall needs to be insulated for screen tubes to be provided? Is there a relationship between screen tubes and insulation requirements of the base material?

P.S. In addition to the topic above, I would also like to know if the connection / anchorage strength change based on the provision of screen tubes? If so, does Hilti Profis have the ability to check the capacity with or without screen tubes?

precast wall panel,Screen tubes,epoxy adhesive anchor
1 Reply
Posted by Emily almost 4 years ago
Hilti Verified

Hi Nik,

HIT-SC screen tubes are required to be used with HIT-HY 270 per page 10 of the Hollow Core Concrete Panel Technical Guide. There is no testing or data for using HIT-HY 270 into hollow core concrete panels without a screen.

Best Regards,
Emily

2 comments on this reply
Posted by Emily almost 4 years ago
Hi Nik, Cure times are impacted by base material temperature. More information on this can be found in the specific adhesive's anchor's instructions for use. PROFIS Engineering currently does not have the ability to analyze an adhesive anchoring system that was tested with a screen tube, without the screen tube -- the software can only model what Hilti has testing for. For further technical assistance within North America, please contact hnatechnicalservices@hilti.com. Thanks, Emily
Posted by NIKalmost 4 years ago
Thank you for your response Emily! Is there a relation between insulation requirements of base material to which the anchor is anchored to? Also, does HILTI profis engineering suite have the ability to study the connection with / without screen tubes?