Table 32 — Hilti HIT-ICE design information with Hilti HIS-R and HIS-RN holes drilled with a hammer drill and carbide bit ( or hollow drill bit ) accordance with ACI 318 Ch . 17 1
Design parameter Symbol Units
Nominal rod diameter ( in .)
3 / 8 1 / 2 5 / 8 3 / 4 ACI 318
Ref
Nominal anchor diameter d a in 0.65 0.81 1.00 1.09 ( mm ) ( 16.5 ) ( 20.5 ) ( 25.4 ) ( 27.6 )
Effective embedment 2 h ef in 4 3 / 8 5 6 3 / 4 8 1 / 8 ( mm ) ( 110 ) ( 125 ) ( 170 ) ( 205 )
Minimum concrete thickness 2 h min in 5.9 6.7 9.1 10.6 ( mm ) ( 150 ) ( 170 ) ( 230 ) ( 270 )
Critical edge distance c ac in ( mm )
Minimum edge distance c min in 3 1 / 4 4 5 5 1 / 2 ( mm ) ( 83 ) ( 102 ) ( 127 ) ( 140 )
Minimum anchor spacing s min in 3 1 / 4 4 5 5 1 / 2 ( mm ) ( 83 ) ( 102 ) ( 127 ) ( 140 )
Effectiveness factor for uncracked concrete 4 k c , uncr -
Effectiveness factor for cracked concrete 4 k c , cr -
Strength reduction factor for tension , concrete failure modes 5 Ф c , N - 0.65 17.3.3
Strength reduction factor for shear , concrete failure modes 5 Ф c , V - 0.70 17.3.3
Temperature range A 6
Characteristic bond stress in cracked concrete 7 τ k , cr psi 350 300 MPa ( 2.4 ) ( 2.1 )
24 ( 10 ) 17 ( 7.1 )
17.4.2.2
17.4.2.2
n / a n / a 17.4.5
Characteristic bond stress in uncracked concrete 7
|
τ k , uncr
|
psi |
830 |
855 |
840 |
830 |
|
|
( MPa ) |
( 5.7 ) |
( 5.9 ) |
( 5.8 ) |
( 5.7 ) |
Reduction for seismic tension α N , seis - n / a
Permissible installation conditions
Strength reduction factor for tension , bond failure modes , dry concrete
Strength reduction factor for tension , bond failure modes , water saturated concrete
Anchor category
- 2 1 1 1
Ф b , dry
- 0.55 0.65 0.65 0.65
Anchor category
- 2 1 1 1
Ф b , ws
- 0.55 0.65 0.65 0.65
1 Design information in this table is based on testing in accordance with ACI 355.4 . 2 See figure 7 of this section . 3 Minimum edge distance may be reduced to 1-3 / 4 " ( 44mm ) < c min
< 5d provided T inst is reduced to 0.30 T inst for 5d < s < 16-in . and to 0.5T ins t for s > 16-in .
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 Values provided for post-installed anchors under Condition B without supplementary reinforcement as defined in ACI 318 17.3.3 . For cases where the presence of supplementary reinforcement can be verified , the reduction factors associated with Condition A may be used .
6 Temperature range A : Max . short term temperature = 130 ° F ( 54 ° 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 strength values corresponding to concrete compressive strength f ' c = 2500 psi ( 17.2 Mpa ). For concrete compressive strength , f ' c
, between 2,500 psi
( 17.2 Mpa ) and 8,000 psi ( 55.2 Mpa ), the tabulated characteristic bond strength may be increased by a factor of ( f ' c / 2,500 ) 0 . 1 [ for SI : ( f ' c
/ 17.2 ) 0 . 1 ].
8 d 0 = drilled hole diameter .
17.4.5
216 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.5 HIT-ICE 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