DESIGN INFORMATION IN MASONRY
Table 13 — Allowable tension loads for Hilti KWIK HUS installed in grout-filled masonry walls ( lb ) 1 , 2 , 3 , 4 , 5
Nominal anchor diameter
3 / 8
1 / 2
5 / 8
3 / 4
Nominal embedment 3 in .
Loads at
c cr and s cr
Critical - s cr
6 in .
Spacing
Minimum - s min
6 in .
Load reduction factor at s min
6
Critical - c cr
7 in .
Edge distance
Minimum c min
8 in .
Load reduction factor 7
1-5 / 8 |
535 |
4 |
2 |
0.70 |
|
|
|
|
2-1 / 2
3-1 / 4
|
895
1,210
|
6 |
4 |
0.80 |
4 |
4 |
1.00 |
2-1 / 4 |
710 |
4 |
2 |
|
|
|
|
|
3
4-1 / 4
|
1,110
1,515
|
8 |
4 |
0.60 |
4 |
4 |
1.00 |
|
3-1 / 4
5
|
1,155
1,735
|
10 |
4 |
0.60 |
10 |
4 |
1.00 |
|
4
6-1 / 4
|
1,680
2,035
|
12 |
4 |
0.60 |
12 |
4 |
1.00 |
Table 14 — Allowable shear loads for Hilti KWIK HUS installed in grout-filled masonry walls ( lb ) 1 , 2 , 3 , 4 , 5
Nominal anchor diameter
3 / 8
1 / 2
5 / 8
3 / 4
Nominal embedment 3 in .
Loads at
c cr and s cr
Critical - s cr
6 in .
Spacing
Minimum - s min
6 in .
Load reduction factor at s min
7
Critical - c cr
8 in .
Minimum c min
8 in .
Edge distance Load reduction factor at c min
Load direction perpendicular to edge
Load direction parallel to edge
1-5 / 8 |
1,140 |
|
|
|
|
|
0.61 |
1.00 |
2-1 / 2 |
1,165 |
6 |
4 |
0.94 |
6 |
4 |
0.70 |
1.00 |
3-1 / 4 |
1,190 |
|
|
|
|
|
0.70 |
1.00 |
2-1 / 4 |
1,845 |
|
|
|
|
|
0.50 |
1.00 |
3 |
2,055 |
8 |
4 |
0.88 |
8 |
4 |
0.45 |
0.94 |
4-1 / 4 |
2,745 |
|
|
|
|
|
0.40 |
0.89 |
|
3-1 / 4
5
|
3,040
3,485
|
10 |
4 |
0.36 |
10 |
4 |
0.36
0.34
|
0.82
0.92
|
|
4
6-1 / 4
|
3,040
3,485
|
10 |
4 |
0.36 |
12 |
4 |
0.36
0.34
|
0.82
0.92
|
1 All values are for anchors installed in fully-grouted masonry with minimum masonry prism strength of 1,500 psi . Concrete masonry units may be lightweight or normal-weight . 2 Anchors may not be installed within 1 inch in any direction of a vertical joint . 3 Embedment depth is measured from the outside face of the concrete masonry embedment .
( )
)
4 Linear interpolation of load values between minimum spacing ( s min ) and critical spacing ( s cr
) and between minimum edge distance ( c min ) and critical edge distance ( c cr
) is permitted .
5 / 3 5 / 3
T applied
V 5 For combined loading : + ≤ 1
T allowable
( applied
V allowable
6 Anchor spacing s cr is where full load values in the table may be used . Anchor-to-anchor spacing of less than s min is not recommended . Spacing is measured from the center of one anchor to the center of an adjacent anchor . 7 Load reduction factors are multiplicative , both spacing and edge distance load reduction factors must be considered . Load values for anchors installed at less than c cr or s cr must be multiplied by the appropriate load reduction factor based on actual edge distance or anchor spacing .
8 Critical edge distance c cr is where full load values in the table may be used . Edge distance spacing of less than c min is not recommended . Edge distance is measured from the center of the anchor to the closest edge .
Table 15 — Hilti KWIK HUS allowable loads installed in top of grout-filled concrete masonry construction ( lb ) 1 , 2
Nominal anchor diameter
Nominal embedment in .
Minimum edge distance in .
Minimum spacing in .
Minimum end distance in .
Tension
Perpendicular to edge of masonry wall
Shear
Parallel to edge of masonry wall
1 / 2 4-1 / 4 1-3 / 4 8 4 680 305 1,110 5 / 8 5 1-3 / 4 10 5 1,310 305 1,165
( )
)
1 All values are for anchors installed in fully-grouted masonry with minimum masonry prism strength of 1,500 psi . Concrete masonry units may be lightweight or normal-weight .
5 / 3 5 / 3
T applied
V 2 For combined loading : + ≤ 1
T allowable
( applied
V allowable
402 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.10 KWIK HUS ( KH ) CARBON STEEL SCREW 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