Product Technical Guide Excerpt for HIT-ICE Cold Weather Adhesive Anchoring System
33
HIT-ICE Technical Supplement
03/2018
Table 49 - Load adjustment factors for 25M rebar in uncracked concrete
1,2,3
c
25M
uncracked
concrete
Spacing factor
in tension
ƒ
AN
Edge distance factor in
tension
ƒ
RN
Spacing factor
in shear
4
ƒ
AV
Edge distance in shear
Concrete thickness
factor in shear
5
ƒ
HV
┴
Toward edge
ƒ
RV
To edge
ƒ
RV
Embedment
h
ef
in.
9-1/16 15-15/16 19-13/16 9-1/16 15-15/16 19-13/16 9-1/16 15-15/16 19-13/16 9-1/16 15-15/16 19-13/16 9-1/16 15-15/16 19-13/16 9-1/16 15-15/16 19-13/16
(mm)
(230) (405) (504) (230) (405) (504) (230) (405) (504) (230) (405) (504) (230) (405) (504) (230) (405) (504)
Spacing (s) / Edge distance (c
a
) / Concrete thickness (h), - in. (mm)
1-3/4 (44)
n/a n/a n/a 0.22 0.12 0.10 n/a n/a n/a 0.03 0.02 0.02 0.07 0.04 0.03 n/a n/a n/a
5 (127)
0.59 0.55 0.54 0.33 0.18 0.14 0.55 0.53 0.53 0.17 0.09 0.08 0.33 0.18 0.14 n/a n/a n/a
6 (152)
0.61 0.56 0.55 0.36 0.20 0.16 0.56 0.54 0.54 0.22 0.12 0.10 0.36 0.20 0.16 n/a n/a n/a
7 (178)
0.63 0.57 0.56 0.40 0.22 0.17 0.57 0.55 0.54 0.27 0.16 0.13 0.40 0.22 0.17 n/a n/a n/a
8 (203)
0.65 0.58 0.57 0.44 0.24 0.19 0.58 0.56 0.55 0.34 0.19 0.15 0.44 0.24 0.19 n/a n/a n/a
9 (229)
0.67 0.59 0.58 0.48 0.26 0.21 0.59 0.56 0.55 0.40 0.23 0.18 0.48 0.26 0.21 n/a n/a n/a
10 (254)
0.68 0.60 0.58 0.52 0.29 0.23 0.60 0.57 0.56 0.47 0.27 0.21 0.52 0.29 0.23 n/a n/a n/a
11-9/16 (294)
0.71 0.62 0.60 0.61 0.33 0.26 0.62 0.58 0.57 0.58 0.33 0.27 0.61 0.33 0.26 0.68 n/a n/a
12 (305)
0.72 0.63 0.60 0.63 0.34 0.27 0.62 0.58 0.57 0.62 0.35 0.28 0.63 0.34 0.27 0.69 n/a n/a
14 (356)
0.76 0.65 0.62 0.73 0.40 0.32 0.64 0.60 0.58 0.78 0.44 0.35 0.73 0.40 0.32 0.75 n/a n/a
16 (406)
0.79 0.67 0.63 0.84 0.46 0.37 0.66 0.61 0.60 0.95 0.54 0.43 0.84 0.46 0.37 0.80 n/a n/a
18 (457)
0.83 0.69 0.65 0.94 0.52 0.41 0.68 0.62 0.61 1.00 0.64 0.52 0.94 0.52 0.41 0.85 n/a n/a
18-7/16 (469)
0.84 0.69 0.66 0.97 0.53 0.42 0.69 0.63 0.61 0.67 0.54 0.97 0.53 0.42 0.86 0.71 n/a
20 (508)
0.87 0.71 0.67 1.00 0.57 0.46 0.70 0.64 0.62 0.75 0.60 1.00 0.57 0.46 0.90 0.74 n/a
22-3/8 (568)
0.91 0.73 0.69 0.64 0.51 0.72 0.65 0.63 0.89 0.72 0.64 0.51 0.95 0.79 0.73
24 (610)
0.94 0.75 0.70 0.69 0.55 0.74 0.67 0.64 0.99 0.80 0.69 0.55 0.98 0.81 0.76
26 (660)
0.98 0.77 0.72 0.75 0.59 0.76 0.68 0.65 1.00 0.90 0.75 0.59 1.00 0.85 0.79
28 (711)
1.00 0.79 0.74 0.80 0.64 0.78 0.69 0.67 1.00 0.80 0.64 0.88 0.82
30 (762)
0.81 0.75 0.86 0.68 0.80 0.71 0.68 0.86 0.68 0.91 0.85
36 (914)
0.88 0.80 1.00 0.82 0.86 0.75 0.71 1.00 0.82 1.00 0.93
> 48 (1219)
1.00 0.90 1.00 0.98 0.83 0.79 1.00 1.00
1 Linear interpolation not permitted
2 Shaded area with reduced edge distance is permitted provided the installation torque is reduced to 0.30 T
max
for5d≤s≤16-in.andto0.5T
max
for s > 16-in.
3 When combining multiple load adjustment factors (e.g. for a four-anchor pattern in a corner with thin concrete member) the design can become very conservative.
To optimize the design, use Hilti PROFIS Anchor Design software or perform anchor calculation using design equations from ACI 318-14 Chapter 17.
4 Spacing factor reduction in shear applicable when c < 3*h
ef
. ƒ
AV
, is applicable when edge distance, c < 3*h
ef
.Ifc≥3*h
ef
, then ƒ
AV
= ƒ
AN
.
5 Concrete thickness reduction factor in shear, ƒ
HV
, is applicable when edge distance, c < 3*h
ef
.Ifc≥3*h
ef
, then ƒ
HV
= 1.0.
Table 50 - Load adjustment factors for 30M rebar in uncracked concrete
1,2,3
c
30M
uncracked
concrete
Spacing factor
in tension
ƒ
AN
Edge distance factor
in tension
ƒ
RN
Spacing factor
in shear
4
ƒ
AV
Edge distance in shear
Concrete thickness
factor in shear
5
ƒ
HV
┴
Toward edge
ƒ
RV
To edge
ƒ
RV
Embedment
h
ef
in.
17-15/16 23-9/16 10-1/4 17-15/16 23-9/16 10-1/4 17-15/16 23-9/16 10-1/4 17-15/16 23-9/16 10-1/4 17-15/16 23-9/16 10-1/4 17-15/16 23-9/16 23-9/16
(mm)
(455) (598) (260) (455) (598) (260) (455) (598) (260) (455) (598) (260) (455) (598) (260) (455) (598) (598)
Spacing (s) / Edge distance (c
a
) / Concrete thickness (h), - in. (mm)
1-3/4 (44)
n/a n/a n/a 0.23 0.13 0.09 n/a n/a n/a 0.02 0.01 0.01 0.04 0.03 0.02 n/a n/a n/a
5-7/8 (150)
0.60 0.55 0.54 0.35 0.19 0.14 0.54 0.53 0.53 0.14 0.08 0.06 0.28 0.16 0.12 n/a n/a n/a
6 (152)
0.60 0.56 0.54 0.35 0.19 0.14 0.55 0.53 0.53 0.14 0.08 0.06 0.28 0.16 0.12 n/a n/a n/a
7 (178)
0.61 0.57 0.55 0.38 0.21 0.16 0.55 0.54 0.53 0.18 0.10 0.08 0.36 0.20 0.15 n/a n/a n/a
8 (203)
0.63 0.57 0.56 0.41 0.23 0.17 0.56 0.54 0.53 0.22 0.12 0.09 0.41 0.23 0.17 n/a n/a n/a
9 (229)
0.65 0.58 0.56 0.45 0.25 0.18 0.57 0.55 0.54 0.26 0.15 0.11 0.45 0.25 0.18 n/a n/a n/a
10 (254)
0.66 0.59 0.57 0.48 0.27 0.20 0.58 0.55 0.54 0.30 0.17 0.13 0.48 0.27 0.20 n/a n/a n/a
11 (279)
0.68 0.60 0.58 0.52 0.29 0.21 0.58 0.56 0.55 0.35 0.20 0.15 0.52 0.29 0.21 n/a n/a n/a
12 (305)
0.70 0.61 0.58 0.56 0.31 0.23 0.59 0.56 0.55 0.40 0.23 0.17 0.56 0.31 0.23 n/a n/a n/a
13-1/4 (337)
0.72 0.62 0.59 0.62 0.34 0.26 0.60 0.57 0.56 0.46 0.26 0.20 0.62 0.34 0.26 0.63 n/a n/a
14 (356)
0.73 0.63 0.60 0.66 0.36 0.27 0.61 0.57 0.56 0.50 0.29 0.22 0.66 0.36 0.27 0.65 n/a n/a
16 (406)
0.76 0.65 0.61 0.75 0.41 0.31 0.62 0.58 0.57 0.61 0.35 0.27 0.75 0.41 0.31 0.69 n/a n/a
18 (457)
0.79 0.67 0.63 0.85 0.46 0.35 0.64 0.59 0.58 0.73 0.42 0.32 0.85 0.46 0.35 0.74 n/a n/a
20 (508)
0.83 0.69 0.64 0.94 0.52 0.39 0.65 0.60 0.59 0.86 0.49 0.37 0.94 0.52 0.39 0.78 n/a n/a
20-7/8 (531)
0.84 0.69 0.65 0.98 0.54 0.41 0.66 0.61 0.59 0.92 0.52 0.40 0.98 0.54 0.41 0.79 n/a n/a
22 (559)
0.86 0.70 0.66 1.00 0.57 0.43 0.67 0.61 0.60 0.99 0.57 0.43 1.00 0.57 0.43 0.81 0.68 n/a
24 (610)
0.89 0.72 0.67 0.62 0.47 0.68 0.62 0.60 1.00 0.64 0.49 0.62 0.47 0.85 0.71 n/a
26-9/16 (675)
0.93 0.75 0.69 0.69 0.52 0.70 0.64 0.61 0.75 0.57 0.69 0.52 0.89 0.74 0.68
28 (711)
0.96 0.76 0.70 0.72 0.54 0.71 0.65 0.62 0.81 0.62 0.72 0.54 0.92 0.76 0.70
30 (762)
0.99 0.78 0.71 0.77 0.58 0.73 0.66 0.63 0.90 0.69 0.77 0.58 0.95 0.79 0.72
36 (914)
1.00 0.83 0.75 0.93 0.70 0.77 0.69 0.66 1.00 0.90 0.93 0.70 1.00 0.86 0.79
> 48 (1219)
0.95 0.84 1.00 0.93 0.86 0.75 0.71 1.00 1.00 0.93 1.00 0.91
1 Linear interpolation not permitted
2 Shaded area with reduced edge distance is permitted provided the installation torque is reduced to 0.30 T
max
for5d≤s≤16-in.andto0.5T
max
for s > 16-in.
3 When combining multiple load adjustment factors (e.g. for a four-anchor pattern in a corner with thin concrete member) the design can become very conservative.
To optimize the design, use Hilti PROFIS Anchor Design software or perform anchor calculation using design equations from ACI 318-14 Chapter 17.
4 Spacing factor reduction in shear applicable when c < 3*h
ef
. ƒ
AV
, is applicable when edge distance, c < 3*h
ef
.Ifc≥3*h
ef
, then ƒ
AV
= ƒ
AN
.
5 Concrete thickness reduction factor in shear, ƒ
HV
, is applicable when edge distance, c < 3*h
ef
.Ifc≥3*h
ef
, then ƒ
HV
= 1.0.