Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 376

Table 12 — Hilti KWIK HUS-EZ I and KWIK HUS-EZ E design information in accordance with CSA A23.3 Annex D 1
Design parameter
Symbol
Units
Nominal anchor diameter
1 / 4
3 / 8
Ref
A23.3
Anchor O . D .
d a
in .
( mm )
0.25
( 6.4 )
0.375
( 9.5 )
Effective embedment 2
h ef
in .
( mm )
1.18
( 30 )
1.92
( 49 )
1.54
( 39 )
Minimum nominal embedment 2
h nom
in .
( mm )
1-5 / 8
( 41 )
2-1 / 2
( 64 )
2 1 / 8
( 54 )
Minimum concrete thickness
h min
in .
( mm )
3-1 / 4
( 83 )
4-1 / 8
( 105 )
3 5 / 8
( 92 )
Critical edge distance
c ac
in .
( mm )
2.00
( 51 )
2.78
( 71 )
2.75
( 70 )
Minimum spacing at critical edge distance
s min , cac
in .
( mm )
1.5
( 38 )
2.25
( 57 )
Minimum edge distance
c min
in .
( mm )
1.50
( 38 )
1.5
( 38 )
Minimum anchor spacing at minimum edge distance
for s >
in .
( mm )
3.0
( 76 )
3
( 76 )
Mininimum hole depth in concrete
h 0
in .
( mm )
2
( 51 )
2-7 / 8
( 73 )
2 3 / 8
( 60 )
Minimum specified ultimate strength
f uta
psi
( N / mm 2 )
125,000
( 862 )
106,975
( 826 )
Effective tensile stress area
A se , N
in 2
( mm 2 )
0.045
( 29.0 )
0.086
( 55.5 )
Steel embed . material resistance factor for reinforcement
ф s
-
0.85
8.4.3
Resistance modification factor for tension , steel failure modes 3
R
-
0.70
D . 5.3
Resistance modification factor for shear , steel failure modes 3
R
-
0.65
D . 5.3
Factored steel resistance in tension
N sar
lb
( kN )
3,370
( 15.0 )
5,475
( 24.4 )
D . 6.1.2
Factored steel resistance in shear
1 / 4-20 UNC
V sar
lb
( kN )
750
( 3.3 )
N / A
D . 7.1.2
Factored steel resistance in shear , seismic
internal thread
V sar , eq
lb
( kN )
335
( 1.5 )
N / A
Factored steel resistance in shear
3 / 8-16 UNC
V sar
lb
( kN )
725
( 3.2 )
N / A
D . 7.1.2
Factored steel resistance in shear , seismic
internal thread
V sar , eq
lb
( kN )
620
( 2.8 )
N / A
Factored steel resistance in shear
Factored steel resistance in shear , seismic
1 / 2-13 UNC internal thread
V sar
V sar , eq
lb
( kN ) lb
( kN )
N / A
1040
( 4.6 )
1040
( 4.6 )
Coeff . for factored conc . breakout resistance , uncracked concrete
k c , uncr
-
10
D . 6.2.2
Coeff . for factored conc . breakout resistance , cracked concrete
k c , cr
-
7
D . 6.2.2
Modification factor for anchor resistance , tension , uncracked conc . 4
ψ c , N
-
1.0
D . 6.2.6
Anchor category
-
-
3
1
1
D . 5.3 ( c )
Concrete material resistance factor
ф c
-
0.65
8.4.2
Resistance modification factor for tension and shear , concrete failure modes , Condition B 5
R
-
0.75
1.00
1.00
D . 5.3 ( c )
Factored pullout resistance in 20 MPa uncracked concrete 6
N pr , uncr
lb
( kN )
665
( 3.0 )
1,645
( 7.3 )
Factored pullout resistance in 20 MPa cracked concrete 6
N pr , cr
lb
( kN )
340
( 1.5 )
815
( 3.6 )
Factored seismic pullout resistance in 20 MPa cracked concrete 6
N pr , eq
lb
( kN )
275
( 1.2 )
815
( 3.6 )
N / A D . 6.3.2
N / A D . 6.3.2
N / A D . 6.3.2
1 Design information in this table is taken from ICC-ES ESR-3027 , tables 6 , 7 , and 8 , and converted for use with CSA A23.3 Annex D . 2 See figure 1 of this section . 3 The KWIK HUS-EZ I is considered a brittle steel element as defined by CSA A23.3 Annex D section D . 2 . 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 For all design cases , ψ c , P
= 1.0 . NA ( not applicable ) denotes that this value does not control for design . See section 4.1.4 of ESR-3027 for additional information .
372 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.8 KWIK HUS-EZ I AND KWIK HUS-EZ E CARBON STEEL SCREW ANCHOR 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