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aDhesiVe anchors
STRENGTH DESIGN (SD)
TECH MANUAL – ADHESIVE ANCHORS ©2015 POWERS VOLUME 1 – 9/2015 – REV. G
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;
140°F (60°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 2,690 3,160 2,750 3,490 2,850 4,085 2,990 5,105 3,095 5,975
4 3,915 5,945 4,000 6,570 4,145 7,690 4,350 9,605 4,500 11,245
6 5,875 10,830 6,005 11,965 6,215 14,010 6,525 16,605 6,755 17,190
10 9,790 23,065 10,005 25,465 10,355 26,360 10,875 27,675 11,255 28,650
5/8 or #5
3-1/8 2,970 4,110 3,035 4,540 3,140 5,320 3,295 6,640 3,410 7,775
5 4,750 9,090 4,855 10,045 5,025 11,760 5,275 14,685 5,460 16,990
7-1/2 7,125 16,555 7,280 18,290 7,535 21,415 7,915 24,620 8,190 25,485
12-1/2 11,875 35,260 12,135 37,755 12,560 39,080 13,190 41,030 13,650 42,470
3/4 or #6
3-1/2 3,570 5,015 3,720 5,700 3,855 6,700 4,030 8,370 4,160 9,800
6 6,570 12,610 6,715 13,935 6,955 16,310 7,300 20,370 7,555 23,510
9 9,855 22,965 10,075 25,375 10,430 29,710 10,950 34,065 11,335 35,260
15 16,430 48,925 16,795 52,245 17,380 54,080 18,250 56,775 18,890 58,770
7/8 or #7
3-1/2 3,445 4,930 3,580 5,605 3,810 6,855 4,015 8,645 4,145 10,125
7 8,675 15,690 8,870 17,340 9,180 20,300 9,635 25,350 9,975 29,675
10-1/2 13,015 28,575 13,300 31,580 13,770 36,970 14,455 44,975 14,965 46,555
17-1/2 21,690 60,885 22,170 67,280 22,950 71,400 24,095 74,960 24,940 77,590
1 or #8
4 4,350 6,115 4,520 6,945 4,810 8,495 5,120 10,890 5,290 12,745
8 11,025 18,955 11,270 20,945 11,665 24,520 12,250 30,625 12,680 35,855
12 16,540 34,520 16,905 38,150 17,500 44,665 18,375 55,775 19,020 59,165
20 27,565 73,560 28,175 81,285 29,165 90,740 30,620 95,265 31,695 98,610
■ - 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.