Supplementary Document
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22
ADHESIVES
STRENGTH DESIGN (SD)
TECH MANUAL – ADHESIVES ©2016 POWERS VOLUME 1 – REV. M
Tension and Shear Design Strength for Reinforcing Bar
Installed in Cracked Concrete (Bond or Concrete Strength)
Drilled with a Hammer-Drill and Carbide Bit in a Dry Hole Condition
162°F (72°C) Maximum Long-Term Service Temperature;
248°F (120°C) Maximum Short-Term Service Temperature
1,2,3,4,5,6,7,8,9
®
Nominal
Rod/Rebar
Size
(#)
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.)
#4
2-3/4 460 985 470 1,010 485 1,050 515 1,105 530 1,145
4 665 1,435 680 1,470 710 1,525 745 1,605 775 1,670
6 1,000 2,150 1,025 2,200 1,060 2,285 1,120 2,410 1,160 2,500
#5
3-1/8 680 1,460 695 1,495 720 1,550 760 1,635 790 1,700
5 1,085 2,335 1,110 2,395 1,155 2,485 1,215 2,620 1,260 2,720
7-1/2 1,625 3,505 1,665 3,590 1,730 3,725 1,825 3,925 1,895 4,075
#6
3-1/2 910 1,965 935 2,010 970 2,085 1,020 2,200 1,060 2,285
6 1,560 3,365 1,600 3,445 1,660 3,575 1,750 3,770 1,815 3,915
9 2,345 5,045 2,400 5,170 2,490 5,365 2,625 5,655 2,725 5,870
#7
3-1/2 950 2,050 975 2,095 1,005 2,170 1,055 2,280 1,095 2,360
7 2,125 4,580 2,175 4,690 2,260 4,870 2,385 5,130 2,475 5,325
10-1/2 3,190 6,870 3,265 7,035 3,390 7,300 3,575 7,700 3,710 7,990
#8
4 1,255 2,705 1,285 2,765 1,330 2,860 1,395 3,005 1,445 3,110
8 2,775 5,980 2,845 6,125 2,950 6,360 3,110 6,705 3,230 6,960
12 4,165 8,970 4,265 9,190 4,430 9,540 4,670 10,055 4,845 10,435
#9
5 1,580 3,405 1,615 3,480 1,675 3,605 1,755 3,785 1,820 3,915
10 3,515 7,570 3,600 7,750 3,735 8,045 3,940 8,485 4,090 8,805
15 5,270 11,355 5,400 11,630 5,605 12,070 5,910 12,725 6,135 13,210
■ - 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 318-14 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.