Anchor Fastening Technical Guide , Edition 22
Table 3 — Hilti Carbon Steel KB-TZ2 design strength based on concrete failure modes in cracked concrete per ACI 318 Ch . 17 , applicable for both hammer and core drilled installations 1 , 2 , 3 , 4 , 5
Nominal anchor diameter in .
1 / 4
3 / 8
1 / 2
5 / 8
3 / 4
1
Effective embedment in . ( mm )
Nominal embedment in . ( mm )
Tension ( lesser of concrete breakout / pullout ) - ФN n
f ́c = 2,500 psi ( 17.2 MPa ) lb ( kN ) f ́c = 3,000 psi ( 20.7 MPa ) lb ( kN ) f ́c = 4,000 psi ( 27.6 MPa ) lb ( kN ) f ́c = 6,000 psi ( 41.1 MPa ) lb ( kN )
Shear ( lesser of concrete breakout or pryout ) - ФV n
f ́c = 2,500 psi ( 17.2 MPa ) lb ( kN ) f ́c = 3,000 psi ( 20.7 MPa ) lb ( kN ) f ́c = 4,000 psi ( 27.6 MPa ) lb ( kN ) f ́c = 6,000 psi ( 41.1 MPa ) lb ( kN )
1-1 / 2 1 3 / 4 280 300 340 395 1,095 1,195 1,385 1,695 ( 38 ) ( 44 ) ( 1.2 ) ( 1.3 ) ( 1.5 ) ( 1.8 ) ( 4.9 ) ( 5.3 ) ( 6.2 ) ( 7.5 ) 1-1 / 2 1 7 / 8 1,255 1,375 1,585 1,940 1,350 1,480 1,710 2,090 ( 38 ) ( 48 ) ( 5.6 ) ( 6.1 ) ( 7.1 ) ( 8.6 ) ( 6.0 ) ( 6.6 ) ( 7.6 ) ( 9.3 ) 2 2 1 / 2 1,930 2,115 2,440 2,990 2,080 2,275 2,630 3,220 ( 51 ) ( 64 ) ( 8.6 ) ( 9.4 ) ( 10.9 ) ( 13.3 ) ( 9.3 ) ( 10.1 ) ( 11.7 ) ( 14.3 ) 2-1 / 2 3 2,185 2,390 2,765 3,385 4,705 5,155 5,950 7,285 ( 64 ) ( 76 ) ( 9.7 ) ( 10.6 ) ( 12.3 ) ( 15.1 ) ( 20.9 ) ( 22.9 ) ( 26.5 ) ( 32.4 ) 1-1 / 2 2 1,435 1,570 1,815 2,220 1,545 1,690 1,950 2,390 ( 38 ) ( 51 ) ( 6.4 ) ( 7.0 ) ( 8.1 ) ( 9.9 ) ( 6.9 ) ( 7.5 ) ( 8.7 ) ( 10.6 ) 2 2 1 / 2 1,930 2,115 2,440 2,990 2,080 2,275 2,630 3,220 ( 51 ) ( 64 ) ( 8.6 ) ( 9.4 ) ( 10.9 ) ( 13.3 ) ( 9.3 ) ( 10.1 ) ( 11.7 ) ( 14.3 ) 2-1 / 2 3 2,700 2,955 3,415 4,180 5,810 6,365 7,350 9,000 ( 64 ) ( 76 ) ( 12.0 ) ( 13.1 ) ( 15.2 ) ( 18.6 ) ( 25.8 ) ( 28.3 ) ( 32.7 ) ( 40.0 ) 3-1 / 4 3 3 / 4 3,235 3,545 4,095 5,015 6,970 7,640 8,820 10,800 ( 83 ) ( 95 ) ( 14.4 ) ( 15.8 ) ( 18.2 ) ( 22.3 ) ( 31.0 ) ( 34.0 ) ( 39.2 ) ( 48.0 ) 2-3 / 4 3 1 / 4 3,110 3,410 3,935 4,820 6,705 7,345 8,480 10,385 ( 70 ) ( 83 ) ( 13.8 ) ( 15.2 ) ( 17.5 ) ( 21.4 ) ( 29.8 ) ( 32.7 ) ( 37.7 ) ( 46.2 ) 3-1 / 4 3 3 / 4 4,000 4,380 5,060 6,195 8,615 9,435 10,895 13,345 ( 83 ) ( 95 ) ( 17.8 ) ( 19.5 ) ( 22.5 ) ( 27.6 ) ( 38.3 ) ( 42.0 ) ( 48.5 ) ( 59.4 ) 4 4 1 / 2 4,420 4,840 5,590 6,845 9,520 10,430 12,040 14,750 ( 102 ) ( 114 ) ( 19.7 ) ( 21.5 ) ( 24.9 ) ( 30.4 ) ( 42.3 ) ( 46.4 ) ( 53.6 ) ( 65.6 ) 3-1 / 4 4 4,000 4,380 5,060 6,195 8,615 9,435 10,895 13,345 ( 83 ) ( 102 ) ( 17.8 ) ( 19.5 ) ( 22.5 ) ( 27.6 ) ( 38.3 ) ( 42.0 ) ( 48.5 ) ( 59.4 ) 3-3 / 4 4 1 / 2 4,955 5,430 6,270 7,680 10,675 11,695 13,505 16,540 ( 95 ) ( 114 ) ( 22.0 ) ( 24.2 ) ( 27.9 ) ( 34.2 ) ( 47.5 ) ( 52.0 ) ( 60.1 ) ( 73.6 ) 4-3 / 4 5 1 / 2 5,745 6,055 6,580 7,405 15,220 16,670 19,250 23,575 ( 121 ) ( 140 ) ( 25.6 ) ( 26.9 ) ( 29.3 ) ( 32.9 ) ( 67.7 ) ( 74.2 ) ( 85.6 ) ( 104.9 )
4 |
4 5 / 8 |
5,460 |
5,980 |
6,905 |
8,460 |
11,760 |
12,880 |
14,875 |
18,220 |
( 102 ) |
( 117 ) |
( 24.3 ) |
( 26.6 ) |
( 30.7 ) |
( 37.6 ) |
( 52.3 ) |
( 57.3 ) |
( 66.2 ) |
( 81.0 ) |
5-3 / 4 |
6 3 / 8 |
7,675 |
8,410 |
9,710 |
11,890 |
20,270 |
22,205 |
25,640 |
31,400 |
( 146 ) |
( 162 ) |
( 34.1 ) |
( 37.4 ) |
( 43.2 ) |
( 52.9 ) |
( 90.2 ) |
( 98.8 ) |
( 114.1 ) |
( 139.7 ) |
3.3.5
1 See Section 3.1.8 to convert design strength value to ASD value . 2 Linear interpolation between embedment depths and concrete compressive strengths is not permitted . 3 Apply spacing , edge distance , and concrete thickness factors in tables 6 to 17 as necessary . Compare to the steel values in table 4 . The lesser of the values is to be used for the design . 4 Tabular values are for normal weight concrete only . For lightweight concrete multiply design strength by λ a as follows : For sand-lightweight , λ a = 0.68 ; for all-lightweight , λ a
= 0.60 . 5 Tabular values are for static loads only . Seismic design is not permitted for uncracked concrete . For seismic tension loads , multiply cracked concrete tabular values in tension only by α N , seis = 0.75 , except for 3 / 4 x 4-3 / 4 h ef where α N , seis
= 0.73 . No reduction needed for seismic shear . See Section 3.1.8 for additional information on seismic applications .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.5 KWIK BOLT TZ2 EXPANSION ANCHOR Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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