Product Overview
17
Adhesives
TECHNICAL GUIDE – ADHESIVES ©2021 DEWALT – REV. F
A
NCHORS & FASTENERS
STRENGTH DESIGN (SD)
Tension and Shear Design Strength for Threaded Rod Installed in Cracked Concrete (Bond or Concrete Strength)
Drilled with a Hammer-Drill and Carbide Bit in a Dry Hole Condition
122°F (50°C) Maximum Long-Term ServiceTemperature;
176°F (80°C) Maximum Short-Term Service Temperature
1,2,3,4,5,6,7,8,9
Nominal
Rod/Rebar
Size
(in.)
Embed.
Depth
h
ef
(in.)
Minimum Concrete Compressive Strength
f'c = 2,500 (psi) f'c = 3,000 (psi) f'c = 4,000 (psi) f'c = 6,000 (psi) f'c = 8,000 (psi)
φ
N
cb
or
φ
N
a
Tension
(lbs.)
φ
V
cb
or
φ
V
cp
Shear
(lbs.)
φ
N
cb
or
φ
N
a
Tension
(lbs.)
φ
V
cb
or
φ
V
cp
Shear
(lbs.)
φ
N
cb
or
φ
N
a
Tension
(lbs.)
φ
V
cb
or
φ
V
cp
Shear
(lbs.)
φ
N
cb
or
φ
N
a
Tension
(lbs.)
φ
V
cb
or
φ
V
cp
Shear
(lbs.)
φ
N
cb
or
φ
N
a
Tension
(lbs.)
φ
V
cb
or
φ
V
cp
Shear
(lbs.)
1/2
2-3/4 1,400 1,985 1,430 2,195 1,485 2,575 1,565 3,220 1,625 3,505
4 2,035 3,735 2,085 4,130 2,160 4,655 2,280 4,910 2,365 5,095
6 3,050 6,570 3,125 6,730 3,245 6,985 3,420 7,365 3,550 7,645
5/8
3-1/8 2,070 2,640 2,120 2,915 2,200 3,420 2,320 4,275 2,410 5,015
5 3,310 5,825 3,390 6,440 3,520 7,550 3,710 7,995 3,855 8,300
7-1/2 4,970 10,605 5,085 10,955 5,280 11,375 5,565 11,990 5,780 12,445
3/4
3-1/2 2,705 3,380 2,760 3,735 2,860 4,380 3,000 5,480 3,105 6,420
6 4,770 8,225 4,885 9,095 5,070 10,660 5,345 11,510 5,550 11,950
9 7,155 14,980 7,325 15,780 7,605 16,380 8,015 17,265 8,320 17,925
7/8
3-1/2 2,755 3,525 2,820 3,910 2,920 4,580 3,070 5,730 3,180 6,715
7 6,490 10,360 6,645 11,455 6,900 13,425 7,275 15,665 7,550 16,265
10-1/2 9,735 18,865 9,970 20,865 10,350 22,295 10,910 23,500 11,325 24,395
1
4 3,640 4,320 3,720 4,775 3,855 5,595 4,045 7,000 4,190 8,205
8 8,480 12,145 8,680 13,430 9,015 15,740 9,500 19,690 9,865 21,240
12 12,720 22,120 13,025 24,460 13,520 28,670 14,250 30,695 14,795 31,865
1-1/4
5 5,870 5,495 6,000 6,080 6,210 7,125 6,525 8,915 6,755 10,445
10 13,400 15,450 13,720 17,085 14,245 20,025 15,015 25,050 15,590 29,360
15 20,100 28,135 20,585 31,115 21,370 36,470 22,525 45,620 23,385 50,365
■ - Concrete Breakout Strength ■ - Bond Strength/Pryout Strength
1. Tabular values are provided for illustration and are applicable for single anchors installed in cracked normal-weight concrete with minimum slab thickness,
h
a
= h
min
, and with the following conditions:
- c
a1
is greater than or equal to the critical edge distance, c
ac
- c
a2
is greater than or equal to 1.5 times c
a1
.
2. Calculations were performed according to ACI 318-14 Ch.17 and ICC-ES AC308. The load level corresponding to the failure mode listed [Concrete breakout strength, bond strength/pryout
strength] must be checked against the tabulated steel strength of the corresponding threaded rod or rebar size and type, the lowest load level controls.
3. Strength reduction factors (
φ
) for concrete breakout strength are based on ACI 318-14 Section 5.3 for load combinations. Condition B was assumed.
4. Strength reduction factors (
φ
) for bond strength are determined from reliability testing and qualification in accordance with ICC-ES AC308 and are tabulated in this product information and
in ESR-2582.
5. Tabular values are permitted for static loads only, seismic loading is not considered with these tables. Periodic special inspection must be performed where required by code, see ESR-2582 for
applicable information.
6. For anchors subjected to tension resulting from sustained loading a supplemental check must be performed according to ACI 318-14 17.3.1.2.
7. For designs that include combined tension and shear, the interaction of tension and shear loads must be calculated in accordance with ACI 318-14 Ch.17.
8. Interpolation is not permitted to be used with the tabular values. For intermediate base material compressive strengths, please see ACI 318-14 Ch.17, ICC-ES AC308 and information included
in this product supplement. For other design conditions including seismic considerations please see ACI 318-14 Ch.17 and ICC-ES AC308 and ESR-2582.
9. Long term concrete temperatures are roughly constant over significant periods of time. Short-term elevated temperatures are those that occur over brief intervals, e.g. as a result of
diurnal cycling.