Installation Guide

12
en
1. Borehole drilling
The drilling method has an influence on the setting procedure. See Table I.
In these installation instructions two different drilling methods, i.e. hammer drilling and diamond coring, are con-
sidered. For detailed information about additional drilling methods please contact Hilti.
• Drill hole to the required embedment depth using a hammer-drill with an
appropriately sized carbide drill bit set in rotation hammer mode.
•
Core drill hole to the required embedment depth using an appropriately
sized diamond core drill bit. Remove all core fragments from the hole
after drilling.
Special Case: Splicing applications for reinforcement bars (rebars)
To be in accordance with the design assumptions, concrete cover, parallel drilling to the surface and splice length
must be carefully ensured during the installation.
Splicing applications for rebars
•
Measure and verify concrete cover c.
•
c
drill
= c + d
s
/2
•
Drill parallel to concrete surface and to existing rebar.
•
Where required use drilling aid.
Drilling aid
Hammer drilling: use drilling aid for holes with 
inst
> 20 cm (8") (check
specific approval for details).
Three different options may be considered a drilling aid:
A) Hilti drilling aid HIT-BH
•
Secure the drilling aid etc. with HKD-S M10×40 or HST M10/10
(HDI 3/8" or KB3 3/8").
•
Drill parallel to the guide rod.
Precaution: Put a clearly visible mark on the guide rod.
B) Slat or spirit level
C) Visual control
Diamond core rigs serve as drilling aids and need to be properly anchored
prior to coring.
Embedment mark
Mark the embedment depth on the rebar
(e.g. with tape) → 
inst
.
Hammer drilling
Diamond coring
02_BA_HIT_Profi_P1_en.qxd 13.12.2006 13:37 Uhr Seite 12