Product Overview

13
Adhesives
TECHNICAL GUIDE – ADHESIVES ©2021 DEWALT – REV. F
A
NCHORS & FASTENERS
STRENGTH DESIGN (SD)
Concrete Breakout Design Information for Threaded Rod and Reinforcing Bars
(For use with loads combinations taken from ACI 318-14 Section 5.3)
1
CODE LISTED
ICC-ES ESR-2582
Design Information Symbol Units
Nominal Rod Diameter (inch) / Reinforcing Bar Size
3/8 or #3 1/2 or #4 5/8 or #5 3/4 or #6 7/8 or #7 1 or #8 #9
1-1/4 or
#10
Effectiveness factor for
cracked concrete
k
c,cr
-
(SI)
Not
Applicable
17
(7.1)
Effectiveness factor for
uncracked concrete
k
c,uncr
-
(SI)
24
(10.0)
Minimum embedment h
ef,min
inch
(mm)
2-3/8
(60)
2-3/4
(70)
3-1/8
(79)
3-1/2
(89)
3-1/2
(89)
4
(102)
4-1/2
(114)
5
(127)
Maximum embedment h
ef,max
inch
(mm)
4-1/2
(114)
6
(152)
7-1/2
(191)
9
(229)
10-1/2
(267)
12
(305)
13-1/2
(343)
15
(381)
Minimum anchor spacing s
min
inch
(mm)
1-7/8
(48)
2-1/2
(64)
3-1/8
(79)
3-3/4
(95)
4-3/8
(111)
5
(127)
5-5/8
(143)
6-1/4
(159)
Minimum edge distance
2
c
min
inch
(mm)
5 d where d is nominal outside diameter of the anchor
Minimum edge distance, reduced
2
c
min,red
inch
(mm)
1-3/4
(45)
1-3/4
(45)
1-3/4
(45)
1-3/4
(45)
1-3/4
(45)
1-3/4
(45)
2-3/4
(70)
2-3/4
(70)
Minimum member thickness h
min
inch
(mm)
h
ef
+ 1-1/4
(h
ef
+ 30)
h
ef
+ 2d
o
where d
o
is hole diameter;
Critical edge distance—splitting
(for uncracked concrete only)
3
c
ac
inch
c
ac
= h
ef
 (
t
uncr
1160
)
0.4
 [3.1-0.7
h
h
ef
]
(mm)
c
ac
= h
ef
 (
t
uncr
8
)
0.4
 [3.1-0.7
h
h
ef
]
Strength reduction factor for tension,
concrete failure modes, Condition B
4
φ
- 0.65
Strength reduction factor for shear,
concrete failure modes, Condition B
4
φ
- 0.70
For SI: 1 inch = 25.4 mm, 1 lbf = 4.448 N. For pound-inch units: 1 mm = 0.03937 inch, 1 N = 0.2248 lbf.
1. Additional setting information is described in the installation instructions.
2. For installation between the minimum edge distance, c
min
, and the reduced minimum edge distance, c
min,red
, the maximum torque applied must be reduced (multiplied) by a factor of 0.45.
3. t
k,uncr
need not be taken as greater than: t
k,uncr =
√
h
ef
• f'c
k
uncr
•
π • d
and
h
h
ef
need not be taken as larger than 2.4.
4. Condition A requires supplemental reinforcement, while Condition B applies where supplemental reinforcement is not provided or where pryout governs, as set forth in ACI 318-14 17.3.3 or
ACI 318-11 D.4.3, as applicable. The tabulated value of φ applies when the load combinations of Section 1605.2 of the IBC, ACI 318-14 5.3 or ACI 318-11 9.2, as applicable, are used
in accordance with ACI 318-14 17.3.3 or ACI 318-11 D.4.3, as applicable. If the load combinations of ACI 318-11 Appendix C are used, the appropriate value of φ must be determined in
accordance with ACI 318 D.4.4.
FLOWCHART FOR THE ESTABLISHMENT OF DESIGN BOND STRENGTH
Cracked Concrete
Normal or Lightweight Concrete
Dry
Concrete
Water Saturated
Concrete
Water-Filled
Hole
(Flooded)
φ
d
φ
ws
φ
wf
Hammer-Drill
t
k,cr
f’c
Uncracked Concrete
Normal or Lightweight Concrete
Dry
Concrete
Water Saturated
Concrete
Water-Filled
Hole
(Flooded)
φ
d
φ
ws
φ
wf
Hammer-Drill
t
k,uncr
f’c