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aDhesiVe anchors
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TECH MANUAL – ADHESIVE ANCHORS ©2015 POWERS VOLUME 1 – 9/2015 – REV. G
STRENGTH DESIGN (SD)
Tension and Shear Design Strength Installed in Uncracked
Concrete (Bond or Concrete Strength)
Drilled with a Core-Drill and Diamond Core 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 2,125 2,875 2,175 3,175 2,250 3,720 2,360 4,645 2,445 5,435
4 3,095 5,410 3,160 5,980 3,270 7,000 3,435 8,740 3,555 9,050
6 4,640 9,855 4,740 10,890 4,910 12,495 5,155 13,115 5,335 13,580
10 7,730 19,680 7,905 20,115 8,180 20,825 8,590 21,860 8,890 22,630
5/8 or #5
3-1/8 2,345 3,740 2,395 4,135 2,480 4,840 2,605 6,045 2,695 7,075
5 3,750 8,270 3,835 9,140 3,970 10,700 4,165 12,960 4,315 13,415
7-1/2 5,625 15,060 5,750 16,645 5,955 18,520 6,250 19,445 6,470 20,125
12-1/2 9,375 29,175 9,585 29,820 9,920 30,865 10,415 32,405 10,780 33,540
3/4 or #6
3-1/2 2,945 4,715 3,005 5,210 3,100 6,100 3,245 7,615 3,350 8,915
6 5,190 11,475 5,305 12,680 5,490 14,845 5,765 17,940 5,970 18,570
9 7,785 20,895 7,960 23,095 8,240 25,630 8,650 26,910 8,955 27,855
15 12,980 40,375 13,265 41,270 13,730 42,720 14,415 44,850 14,920 46,425
7/8 or #7
3-1/2 2,920 4,870 2,980 5,380 3,080 6,300 3,220 7,865 3,325 9,210
7 6,850 14,275 7,000 15,775 7,245 18,465 7,610 23,060 7,875 24,500
10-1/2 10,275 25,995 10,500 28,730 10,870 33,635 11,410 35,505 11,815 36,750
17-1/2 17,125 53,270 17,500 54,450 18,115 56,365 19,020 59,175 19,690 61,250
1 or #8
4 3,720 6,115 3,805 6,775 3,930 7,935 4,110 9,905 4,245 11,600
8 8,710 17,245 8,900 19,060 9,215 22,315 9,675 27,865 10,015 31,150
12 13,065 31,410 13,350 34,710 13,820 40,640 14,510 45,140 15,020 46,725
20 21,770 66,930 22,255 69,230 23,035 71,665 24,185 75,235 25,030 77,880
■ - Concrete Breakout Strength ■ - Bond Strength/Pryout Strength
1. Tabular values are provided for illustration and are applicable for single anchors installed in uncracked 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.