Table 14 — Hilti KB1 design strength in the soffit of uncracked lightweight concrete over metal deck 1 , 2 , 3 , 4 , 5 , 6
Nominal anchor diameter in .
3 / 8
1 / 2
5 / 8
Effective embedment in . ( mm )
Nominal embedment in . ( mm )
Min . conc . thickness 10 in . ( mm )
Installation per Figure 3 Installation per Figure 4
Min . conc . = 3,000 psi f ́c
|
= 4,000 psi f ́c
|
≥ 3,000 psi f ́c
|
Tension - ФN n
|
Shear - ФV n
|
|
( 20.7 MPa ) lb ( kN ) |
( 27.6 MPa ) lb ( kN ) |
( 20.7 MPa ) lb ( kN ) |
thickness 10 in . ( mm ) |
1-1 / 2 1-7 / 8 2-1 / 2 1,025 1,185 645 ( 38 ) ( 48 ) ( 64 ) ( 4.6 ) ( 5.3 ) ( 2.9 ) f ́c = 3,000 psi ( 20.7 MPa ) lb ( kN )
Tension - ФN n
f ́c = 4,000 psi ( 27.6 MPa ) lb ( kN )
Shear - ФV n
f ́c ≥ 3,000 psi ( 20.7 MPa ) lb ( kN )
n / a n / a n / a n / a
2 2-3 / 8 2-1 / 2 1,600 1,850 1,435 2-1 / 2 1,265 1,460 1,815 ( 51 ) ( 60 ) ( 64 ) ( 7.1 ) ( 8.2 ) ( 6.4 ) ( 64 ) ( 5.6 ) ( 6.5 ) ( 8.1 ) 2 2-3 / 8 2-1 / 2 1,495 1,725 1,480 2-1 / 2 1,355 1,565 2,015 ( 51 ) ( 60 ) ( 64 ) ( 6.7 ) ( 7.7 ) ( 6.6 ) ( 64 ) ( 6.0 ) ( 7.0 ) ( 9.0 ) 3-1 / 4 3-5 / 8 2-1 / 2 2,725 3,145 2,355 3-1 / 4 1,920 2,215 3,105 ( 83 ) ( 92 ) ( 64 ) ( 12.1 ) ( 14.0 ) ( 10.5 ) ( 83 ) ( 8.5 ) ( 9.9 ) ( 13.8 ) 2-3 / 4 3-1 / 4 2-1 / 2 2,410 2,785 2,275 3-1 / 4 1,505 1,740 2,595 ( 70 ) ( 83 ) ( 64 ) ( 10.7 ) ( 12.4 ) ( 10.1 ) ( 83 ) ( 6.7 ) ( 7.7 ) ( 11.5 ) 4 4-1 / 2 2-1 / 2 3,300 3,810 3,080
( 102 ) ( 114 ) ( 64 ) ( 14.7 ) ( 16.9 ) ( 13.7 ) n / a n / a n / a n / a
3 / 4
3-1 / 4 4 2-1 / 2 2,285 2,640 3,030 9 n / a n / a n / a n / a ( 83 ) ( 102 ) ( 64 ) ( 10.2 ) ( 11.7 ) ( 13.5 ) 9
Table 15 — Hilti KB1 design strength in the soffit of cracked lightweight concrete over metal deck 1 , 2 , 3 , 4 , 5 , 6 , 7
Nominal anchor diameter in .
3 / 8
1 / 2
5 / 8
Effective embedment in . ( mm )
Nominal embedment in . ( mm )
Min . conc . thickness 10 in . ( mm )
Installation per Figure 3 Installation per Figure 4
Min . conc . = 3,000 psi f ́c
|
= 4,000 psi f ́c
|
≥ 3,000 psi f ́c
|
Tension - ФN n
|
Shear - ФV n
|
|
( 20.7 MPa ) lb ( kN ) |
( 27.6 MPa ) lb ( kN ) |
( 20.7 MPa ) lb ( kN ) |
thickness 10 in . ( mm ) |
1-1 / 2 1-7 / 8 2-1 / 2 725 835 645 ( 38 ) ( 48 ) ( 64 ) ( 3.2 ) ( 3.7 ) ( 2.9 ) f ́c = 3,000 psi ( 20.7 MPa ) lb ( kN )
Tension - ФN n
f ́c = 4,000 psi ( 27.6 MPa ) lb ( kN )
Shear - ФV n
f ́c ≥ 3,000 psi ( 20.7 MPa ) lb ( kN )
n / a n / a n / a n / a
2 2-3 / 8 2-1 / 2 1,210 1,395 1,435 2-1 / 2 955 1,105 1,815 ( 51 ) ( 60 ) ( 64 ) ( 5.4 ) ( 6.2 ) ( 6.4 ) ( 64 ) ( 4.2 ) ( 4.9 ) ( 8.1 ) 2 2-3 / 8 2-1 / 2 1,060 1,225 1,480 2-1 / 2 960 1,110 2,015 ( 51 ) ( 60 ) ( 64 ) ( 4.7 ) ( 5.4 ) ( 6.6 ) ( 64 ) ( 4.3 ) ( 4.9 ) ( 9.0 ) 3-1 / 4 3-5 / 8 2-1 / 2 1,930 2,230 2,355 3-1 / 4 1,360 1,570 3,105 ( 83 ) ( 92 ) ( 64 ) ( 8.6 ) ( 9.9 ) ( 10.5 ) ( 83 ) ( 6.0 ) ( 7.0 ) ( 13.8 ) 2-3 / 4 3-1 / 4 2-1 / 2 1,930 2,230 2,275 3-1 / 4 1,205 1,390 2,595 ( 70 ) ( 83 ) ( 64 ) ( 8.6 ) ( 9.9 ) ( 10.1 ) ( 83 ) ( 5.4 ) ( 6.2 ) ( 11.5 ) 4 4-1 / 2 2-1 / 2 2,480 2,865 3,080
( 102 ) ( 114 ) ( 64 ) ( 11.0 ) ( 12.7 ) ( 13.7 ) n / a n / a n / a n / a
3 / 4
3-1 / 4 4 2-1 / 2 2,000 2,310 3,030 8 , 9 n / a n / a n / a n / a ( 83 ) ( 102 ) ( 64 ) ( 8.9 ) ( 10.3 ) ( 13.5 ) 8 , 9
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 Tabular value is for one anchor per flute . Minimum spacing along the length of the flute is 3 x h ef
( effective embedment ). 4 Tabular values are lightweight concrete and no additional reduction factor for lightweight concrete is needed . 5 Minimum edge distance is 3 x h ef
( effective embedment ). 6 Comparison of the tabular values to the steel strength is not necessary . Tabular values control . 7 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
= 0.67 . See PTG 19 Section 3.1.8 for additional information on seismic applications . 8 For the 3 / 4-inch diameter anchor , an additional factor for seismic shear , α N , seis
= 0.85 , must be applied to the cracked concrete tabular values for seismic conditions . See Section
3.1.8 for additional information on seismic applications . 9 For the 3 / 4x12 KB1 , multiply tabular value by 0.92 . 10 Minimum concrete thickness over the upper flute when anchor is installed in the lower flute . See Figure 3 and 4 .
384 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.9 KB1 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