Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 145

Anchor Fastening Technical Guide , Edition 22
Table 55 — Hilti HIT-RE 500 V3 adhesive design information with CA rebar in diamond core drilled holes in accordance with CSA A23.3 Annex D 1
Rebar size
Ref
Design parameter
Symbol
Units
10M
15M
20M
25M
30M
A23.3-14
Anchor O . D .
d a
11.3
16.0
19.5
25.2
29.9
Effective minimum embedment 2
h ef
60
80
90
101
120
Effective maximum embedment 2
h ef
226
320
390
504
598
3.2.3
Min . concrete thickness 2 h min – h ef
+ 30 h ef + 2d 0
Critical edge distance
c ac
2h ef
Minimum edge distance 3
c min
57
80
98
126
150
Minimum anchor spacing s min – 57 80 98 126 150
Coeff . for factored conc . breakout resistance , uncracked concrete 4 k c , uncr – 10 D . 6.2.2
Coeff . for factored conc . breakout resistance , cracked concrete 4 k c , cr
– 7 D . 6.2.2 Concrete material resistance factor фc – 0.65 8.4.2
Resistance modification factor for tension and shear , concrete failure modes , Condition B 5 R conc
– 1.00 D . 5.3 ( c )
Temp . range
A 6
Dry concrete and water saturated concrete
Characteristic bond stress in cracked concrete 7 τ uncr psi 1,150 1,150 1,150 1,150 1,150 ( MPa ) ( 7.9 ) ( 7.9 ) ( 7.9 ) ( 7.9 ) ( 7.9 )
D . 6.5.2
Temp . range
B 6
Characteristic bond stress in uncracked concrete 7 τ uncr psi 800 800 800 800 800
( MPa ) ( 5.5 ) ( 5.5 ) ( 5.5 ) ( 5.5 ) ( 5.5 ) Anchor category , dry concrete – – 2 3 3 3 3 Resistance modification factor R dry
– 0.85 0.75 0.75 0.75 0.75
1 Design information in this table is taken from ELC-3814 , dated April 2018 , table 23 and 25B , and converted for use with CSA A23.3 Annex D . 2 See figure 2 of section 3.2.4.3.1 . 3 Minimum edge distance may be reduced to 45mm provided rebar remains untorqued . See ESR-3814 section 4.1.9 . 4 For all design cases , ψ c , N
= 1.0 . The appropriate coefficient for breakout resistance for cracked concrete ( k c , cr ) or uncracked concrete ( k c , uncr
) must be used .
5 For use with the load combinations of CSA A23.3 chapter 8 . Condition B applies where supplementary reinforcement in conformance with CSA A23.3 section D . 5.3 is not provided , or where pullout or pryout strength governs . For cases where the presence of supplementary reinforcement can be verified , the resistance modification factors associated with Condition A may be used .
6 Temperature range A : Max . short term temperature = 130 ° F ( 55 ° C ), max . long term temperature = 110 ° F ( 43 ° C ). Temperature range B : Max . short term temperature = 176 ° F ( 80 ° C ), max . long term temperature = 110 ° F ( 43 ° C ).
Short term elevated concrete temperatures are those that occur over brief intervals , e . g ., as a result of diurnal cycling . Long term concrete temperatures are roughly constant over significant periods of time .
7 Bond stress values correspond to concrete compressive strength ƒ ' c = 2,500 psi ( 17.2 MPa ). For concrete compressive strength , ƒ ' c
, between 2,500 psi
( 17.2 MPa ) and 8,000 psi ( 55.2 MPa ), the tabulated characteristic bond stress may be increased by a factor of ( ƒ ' c / 2,500 ) 0 . 25 [ for SI : ( ƒ ' c
/ 17.2 ) 0 . 25 ] for uncracked concrete .
D . 6.5.2
D . 5.3 ( c )
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.3 HIT-RE 500 V3 EPOXY ADHESIVE ANCHORING SYSTEM Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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