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17
aDhesiVe anchors
STRENGTH DESIGN (SD)
TECH MANUAL – ADHESIVE ANCHORS ©2015 POWERS VOLUME 1 – 9/2015 – REV. G
Tension and Shear Design Strength Installed in Cracked Concrete
(Bond or Concrete Strength)
Drilled with a Hammer-Drill and Carbide Bit in a Dry Hole Condition
110°F (43°C) Maximum Long-Term Service Temperature;
176°F (80°C) Maximum Short-Term Service Temperature
1,2,3,4,5,6,7,8,9
®
Nominal
Rod/Rebar
Size
(in. or #)
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
Ncb
or
Φ
Na
Tension
(lbs.)
Φ
Vcb or
Φ
Vcp
Shear
(lbs.)
Φ
Ncb
or
Φ
Na
Tension
(lbs.)
Φ
Vcb or
Φ
Vcp
Shear
(lbs.)
Φ
Ncb
or
Φ
Na
Tension
(lbs.)
Φ
Vcb or
Φ
Vcp
Shear
(lbs.)
Φ
Ncb
or
Φ
Na
Tension
(lbs.)
Φ
Vcb or
Φ
Vcp
Shear
(lbs.)
Φ
Ncb
or
Φ
Na
Tension
(lbs.)
Φ
Vcb or
Φ
Vcp
Shear
(lbs.)
1/2 or #4
2-3/4 1,280 2,070 1,305 2,285 1,350 2,680 1,420 3,055 1,470 3,165
4 1,860 3,895 1,900 4,090 1,965 4,235 2,065 4,445 2,135 4,600
6 2,785 6,005 2,850 6,135 2,950 6,350 3,095 6,670 3,205 6,905
10 4,645 10,005 4,750 10,225 4,915 10,585 5,160 11,115 5,340 11,505
5/8 or #5
3-1/8 1,490 2,700 1,525 2,985 1,580 3,400 1,655 3,570 1,715 3,695
5 2,385 5,140 2,440 5,255 2,525 5,440 2,650 5,710 2,745 5,910
7-1/2 3,580 7,710 3,660 7,880 3,790 8,160 3,975 8,565 4,115 8,865
12-1/2 5,965 12,850 6,100 13,135 6,315 13,595 6,630 14,275 6,860 14,775
3/4 or #6
3-1/2 1,815 3,410 1,850 3,770 1,910 4,115 2,000 4,305 2,065 4,445
6 3,205 6,905 3,280 7,060 3,395 7,310 3,560 7,675 3,685 7,940
9 4,810 10,360 4,915 10,590 5,090 10,960 5,345 11,510 5,530 11,915
15 8,020 17,270 8,195 17,650 8,485 18,270 8,905 19,180 9,220 19,855
7/8 or #7
3-1/2 1,750 3,525 1,785 3,850 1,845 3,975 1,930 4,160 1,995 4,295
7 4,115 8,865 4,205 9,060 4,355 9,375 4,570 9,845 4,730 10,190
10-1/2 6,170 13,295 6,310 13,590 6,530 14,065 6,855 14,765 7,095 15,285
17-1/2 10,285 22,155 10,515 22,650 10,885 23,445 11,425 24,610 11,830 25,475
1 or #8
4 2,270 4,365 2,345 4,910 2,420 5,210 2,530 5,450 2,615 5,630
8 5,375 11,575 5,495 11,830 5,685 12,250 5,970 12,860 6,180 13,310
12 8,060 17,365 8,240 17,750 8,530 18,370 8,955 19,290 9,270 19,965
20 13,435 28,940 13,735 29,580 14,215 30,620 14,925 32,145 15,450 33,275
#9
4-1/2 2,815 5,080 2,930 5,770 3,030 6,530 3,170 6,830 3,275 7,055
9 6,800 14,650 6,955 14,975 7,195 15,500 7,555 16,275 7,820 16,845
13-1/2 10,205 21,975 10,430 22,465 10,795 23,250 11,335 24,410 11,730 25,270
22-1/2 17,005 36,630 17,380 37,440 17,990 38,755 18,890 40,685 19,555 42,115
1-1/4
5 3,500 5,835 3,640 6,630 3,805 7,895 3,980 8,570 4,110 8,850
10 8,400 17,145 8,585 18,490 8,885 19,135 9,330 20,090 9,655 20,795
15 12,595 27,130 12,875 27,730 13,330 28,705 13,990 30,135 14,485 31,195
25 20,995 45,220 21,460 46,220 22,215 47,845 23,320 50,230 24,140 51,995
#10
5 3,460 5,830 3,595 6,620 3,755 7,880 3,930 8,470 4,060 8,745
10 8,400 17,175 8,585 18,490 8,885 19,135 9,330 20,090 9,655 20,795
15 12,595 27,130 12,875 27,730 13,330 28,705 13,990 30,135 14,485 31,195
25 20,995 45,220 21,460 46,220 22,215 47,845 23,320 50,230 24,140 51,995
■ - 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 318-11 Appendix D 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 (
f
) for concrete breakout strength are based on ACI 318 Section 9.2 for load combinations. Condition B was assumed.
4. Strength reduction factors (
f
) 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-2583.
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-2583
for applicable information.
6. For anchors subjected to tension resulting from sustained loading a supplemental check must be performed according to ACI 318-11 D.4.1.2.
7. For designs that include combined tension and shear, the interaction of tension and shear loads must be calculated in accordance with ACI 318-11 Appendix D.
8. Interpolation is not permitted to be used with the tabular values. For intermediate base material compressive strengths, please see ACI 318-11 Appendix D, ICC-ES AC308 and information
included in this product supplement. For other design conditions including seismic considerations please see ACI 318-11 Appendix D and ICC-ES AC308 and ESR-2583.
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.