FIELD FIXES For installation errors with HAC and HAC-T cast-in anchor channels using HBC channel bolts August 2019
CONTENT 1 Introduction 4 2 Product range covered 5 3 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 Correct Installation of HAC channels and HBC bolts Installation of HAC anchor channel systems Installation instructions for anchor channels HAC and HAC-T Installation instructions for HBC-B channel bolts Installation instructions for HBC-C channel bolts Installation instructions for HBC-T channel bolts Installation instructions for HBC-C-N channel bolts 6 6 7 8 9 10 11 4 4.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.3 4.3.
1. INTRODUCTION The field remediations provided in this brochure are valid for Hilti Anchor Channels (HAC) with channel bolts HBC-B, HBC-C and HBC-C-N and Hilti Serrated Anchor Channels (HAC-T) with channel bolts HBC-T. Additionally, the remediations are limited to the anchor channels described on page 5. Anchor channels with different profiles and/or anchor geometry have not been investigated and therefore, they are outside the scope of this brochure. It is based on the ETA-11/0006 issued 18.07.
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3. CORRECT INSTALLATION OF HAC CHANNELS AND HBC BOLTS 3.1. Installation of HAC anchor channel systems HAC and HAC-T anchor channels are covered in the European Technical Assessment (ETA-11/0006) and in the ICC Evaluation Service Report (ESR-3520). In both documents two types of installations are covered as shown in Figure 1. 1) The channel can be installed with full contact of the fixture between concrete surface and channel profile.
3.1.1. I nstallation instructions for anchor channels HAC and HAC-T 2 2 2 2 [ [ [ ;< +$& < ; +$& ;< +$& 3d HAC 3d HAC 3d HAC 3d 3c 5 [ 6 +$& ;< +$& ;< +$& ;< +$& ;< ;< 4 4 4 +$& +$& ;< 3a 3b HAC(-T) HAC(-T) 3c HAC(-T) ;< +$& ;< +$& ;< +$& 6 and 7) Remove the foam filler after hardening of concrete and striking the formwork.
(105x148mm) HAC(-T) 2015302 A9-05.2018 2214763 A2 (105x148mm) 3.1.2. Installation instructions for HBC-B channel bolts 1 4 26.06.2018 (65 2214763 A2 26.06.2018 +$& ;< +$& ;< 2) Place the channel bolt in the channel and lock the channel bolt in the channel 3b by turning it3a 90 degrees. 3) Verify alignment [of the bolt with the groove. Groove of bolt must be perpendicular to the longitudinal axis of the channel.
(105x148mm) HAC(-T) 2015302 A9-05.2018 437419 B4 (105x148mm) 3.1.3. Installation instructions for HBC-C channel bolts 1 4 20.07.2018 (65 437419 B4 20.07.2018 (105x148mm) HBC-C 437419 B4 1 20.07.2018 (105x148mm) HBC-C 1 437419 B4 20.07.2018 (105x148mm) +$& ;< +$& ;< 2) Place the channel bolt in the channel and lock the channel bolt in the channel 3b by turning 3a it 90 degrees. 3) Verify alignment [ of the bolt with the groove.
26.05.2018 2155164 A4 (105x148mm) 20.07.2018 bolts (65 HBC-T +$& 2155164 A4 (105x148mm) 1 20.07.2018 ;< 1) Select Hilti serrated channel &35 0 bolt in accordance with the design specification. 2 2) Place the channel bolt in the channel and lock the channel bolt in the channel by turning it 90 degrees. & 7 +% ) +$& +$& ;< 4) Verify that3c the channel bolt is not 3d located outside the part of the channel bounded by the outermost anchors.
HAC 2138453 A5 (105x148mm) 20.07.2018 HAC(-T) 2138453 A5 (105x148mm) 3.1.5. Installation instructions for HBC-C-N channel bolts 2015302 A9-05.2018 4 HBC-C-N 2138453 A5 (105x148mm) 20.07.2018 (65 +$& ;< 2) Place the channel bolt in the channel and lock the channel bolt in the channel by turning it 90 degrees. +$& ;< 3a 3b 3) Verify alignment of the bolt with the groove. Groove of bolt must be [ perpendicular to the longitudinal axis of the channel.
Remark for fixtures with slotted holes Generally, in many applications such as curtain wall fastenings, fixtures with slotted holes are used (Figure 7). These provide orthogonal tolerances to the channel axis and facilitate the installation. Without proper support of the channel lips, as specified in the instructions for use (IFU), the HBC-C-N Notching T-bolts can cause damage to the channel lip. Schematic representation of this is given in Figure 8 and 9.
4. RECOMMENDATIONS FOR INCORRECTLY INSTALLED ANCHOR CHANNEL SYSTEMS 4.1. Potential cases of incorrectly installed anchor channel systems In the following sections, several potential installation defects of anchor channel systems are described and Hilti recommendations are given based on testing and sound engineering judgement. The load directions considered in this document are shown in Figure 10.
c) Anchor channel installed with wrong edge/corner distance d) Anchor channel installed inclined Rotation around x-axis Rotation around y-axis Rotation around z-axis e) Channel bolt not installed correctly Figure 11: Potential installation errors a) – e) 14
4.2. Anchor channel not installed correctly 4.2.1. Anchor channel installed too deep Description of the problem When anchor channels are cast too deep into the concrete, the channel lips are not flush with the concrete surface (Figure 12). This type of installation error may result from incorrect anchor channel placement in the formwork.
4.2.2. Anchor channel installed too high Description of the problem When anchor channels are cast too high into the concrete, the channel lips are not flush with the concrete surface and the anchor channel system protrudes from the concrete (Figure 14). This type of installation error may result from incorrect anchor channel placement in the formwork.
4.2.3. Edge and/or corner distances not according to design Description of the problem The anchor channel is properly embedded in the concrete member but the edge and/or corner distances are not according to the design specifications (Figure 17). Both edge and/or corner distance can be larger or smaller than the specified distance.
4.2.4. Channel inclined (rotation around x-, y- and z-direction) Description of the problem If anchor channels are not properly fastened in the formwork, rotation of the anchor channel around the x-, y- or z-axis may result. This can also happen through bumps with the vibrator during the concrete pour or movement of the channel (e.g. workers walking on the reinforcement before filling in the concrete).
Recommendations Channel inclined (α) Rotation around x-axis Rotation around y-axis Recommendations ≤ 3° No actions needed > 3° ≤ 6° Required actions on site: The channel bolt needs to be installed inclined (channel bolt head in full contact with the channel lips). This can be achieved by using a wedge washer to avoid bending the channel lips during installation and a spherical washer underneath the nut (see Figure 21). > 6° A general assessment is not possible.
4.3. Channel bolt not installed correctly 4.3.1. Wrong installation torque applied Description of the problem: The installation torque applied to the channel bolts is not in accordance with the instructions for use (IFU). Either the installation torque is too high or too low. Wrong installation torque Possible consequences: HBC-B Channel bolt not installed correctly During bolt installation Tinst less than specified acc. to Section 3.1.2 Tinst more than specified acc. to Section 3.1.
Recommendations: HBC-C Channel bolt not installed correctly Tinst less than specified acc. to Section 3.1.3 Recommendations Torque channel bolts up to the required value according to the instructions for use (IFU). Tinst more than specified for general condition (installation type A) and less than steel-steel contact (installation type B) acc. to Section 3.1.3 Tinst more than specified for steel-steel contact (installation type B) acc. to Section 3.1.
Possible consequences: HBC-C-N Channel bolt not installed correctly During bolt installation Tinst less than specified acc. to Section 3.1.5 Tinst more than specified for steel-steel contact (installation type B) acc. to Section 3.1.
4.3.2. Installation of channel bolts more than once 40 mm (1.57 in) Description of the problem In some applications, Hilti channel bolts may be installed multiple times. This can happen during maintenance operations or in case the fixture needs to be replaced or moved.
5. USE OF POST-INSTALLED ANCHORS Description of problem A field fix according to Section 4 is not possible. Anchor channel cannot be used anymore due to wrong position or damage of the anchor, so the fastening needs to be made by other means (see Figure 23). This situation can happen due to several reasons: • Wrong planning of location or wrong location of anchor channel realized on site (e.g. Section 4.2.3) • Movement of the channel during casting concrete (e.g. Section 4.2.
Disclaimer The data, information and/or underlying calculations contained in this document are based on the principles, formulae and safety factors set out in the Hilti technical instructions, the operating manuals, the setting instructions, the installation manuals and other data sheets that are believed to be correct at the time of writing. The data and values are based on the respective characteristic data obtained from tests under laboratory or other controlled conditions.
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