Product Technical Guide Excerpt for HIT-ICE Cold Weather Adhesive Anchoring System

29
HIT-ICE Technical Supplement
03/2018
Table 42 - Hilti HIT-ICE adhesive design information with CA rebar in hammer drilled holes in accordance c
with CSA A23.3-14 Annex D
1
Design parameter Symbol Units
Rebar size Ref
10M 15M 20M 25M 30M A23.3-14
Anchor O.D.
d
a
mm 11.3 16.0 19.5 25.2 29.9
Effective minimum embedment
2
h
ef,min
mm 70 80 90 101 120
Effective maximum embedment
2
h
ef,max
mm 226 320 390 504 598
Minimum concrete thickness
2
h
min
mm h
ef
+ 30 h
ef
+ 2d
o
Critical edge distance
c
ac
mm
Minimum edge distance
c
min
3
mm 57 80 98 126 150
Minimum anchor spacing
s
min
mm 57 80 98 126 150
Coeff. for factored concrete breakout resistance, uncracked concrete
k
c,uncr
4
– 10 D.6.2.2
Coeff. for factored concrete breakout resistance, cracked concrete
k
c,cr
4
– 7 D.6.2.2
Concrete material resistance factor
ф
c
– 0.65 8.4.2
Resistancemodicationfactorfortensionandshear,concretefailure
modes, Condition B
5
R
conc
– 1.00 D.5.3(c)
Temp.
range A
6
Characteristic bond stress in cracked concrete
7
τ
cr
psi
n/a n/a n/a n/a n/a D.6.5.2
(MPa)
Characteristic bond stress in uncracked concrete
7
τ
uncr
psi 1,010 990 975 950 930
D.6.5.2
(MPa) (7.0) (6.8) (6.7) (6.6) (6.4)
Reduction for seismic tension
α
N,seis
– n/a
Permissible
installation
conditions
Resistancemodicationfactortension&shear,bondfailure
dry concrete
Anchor
category
– 1 1 2 2 1
D.5.3(c)
R
dry
– 1.00 1.00 0.85 0.85 1.00
Resistancemodicationfactortension&shear,bondfailure
water-saturated concrete
Anchor
category
– 1 1 2 2 1
D.5.3(c)
R
ws
– 1.00 1.00 0.85 0.85 1.00
1 Design information in this table is based on testing in accordance with ACI 355.4.
2 Seegure5ofthissection.
3 Minimum edge distance may be reduced to 45mm provided rebar remains untorqued.
4 Foralldesigncases,ψ
c,N
=1.0.Theappropriatecoefcient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 A23.3-14 chapter 8. Condition B applies where supplementary reinforcement in conformance with CSA A23.3-14
sectionD.5.3isnotprovided,orwherepulloutorpryoutstrengthgoverns.Forcaseswherethepresenceofsupplementaryreinforcementcanbeveried,the
resistancemodication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).
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signicantperiodsoftime.
7 Bond strength values corresponding to concrete compressive strength f'
c
= 2,500 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
].
Table 43 - CA rebar installation specifications with Hilti HIT-ICE adhesive anchor system c
Setting information Symbol Units
Rebar size
10M 15M 20M 25M 30M
Nominal bit diameter d
o
in. 9/16 3/4 1 1-1/4 1-3/8
Effective
embedment
minimum h
ef,min
mm 60 80 90 100 120
maximum h
ef,max
mm 226 320 390 504 598
Minimum concrete thickness h
min
mm h
ef
+ 30 h
ef
+ 2d
o