Product Overview
TECHNICAL GUIDE – MECHANICAL ANCHORS ©2021 DEWALT – REV. E
A
NCHORS & FASTENERS
REFERENCE DATA (ASD)
11
Mechanical anchors
Allowable Screw-Bolt+ Tension and Shear Load Capacities
Installed into the Face of Brick Masonry Walls
1,2,3,4,5,6,7,8
Tension Load
Anchor
Diameter, d
in.
Minimum
Embedment,
h
nom
in.
(mm)
Allowable Load
at c
cr
and s
cr
lbs
(kN)
Spacing Distance, s Edge or End Distance
Critical
Distance, s
cr
in.
(mm)
Minimum
Distance, s
min
in.
(mm)
Allowable Load
Factor at s
min
in.
(mm)
Critical
Distance, c
cr
in.
(mm)
Minimum
Distance, c
min
in.
(mm)
Allowable Load
Factor at c
min
1/4
1-5/8
(41.3)
550
(2.4)
4
(101.6)
2
(50.8)
0.60
3-3/4
(95.3)
1-1/4
(31.8)
0.25
2-1/2
(63.5)
830
(3.7)
3/8
2
(50.8)
905
(4.0)
6
(152.4)
3
(76.2)
0.60
6
(152.4)
1-1/2
(38.1)
0.50
3-1/4
(82.6)
1,115
(5.0)
1/2
2-1/2
(63.5)
1,015
(4.5)
8
(203.2)
4
(101.6)
0.60
8
(203.2)
2-5/8
(66.7)
0.50
4-1/4
(108.0)
1,495
(6.7)
5/8
3-1/4
(82.6)
1025
(4.6)
10
(254.0)
5
(127.0)
0.50
10
(254.0)
3-3/8
(85.7)
0.50
5
(127.0)
2,015
(9.0)
3/4
4
(101.6)
1,815
(8.1)
12
(304.8)
6
(152.4)
0.50
12
(304.8)
4
(101.6)
0.50
6-1/4
(158.8)
2,400
(10.7)
Shear Load
Anchor
Diameter, d
in.
Minimum
Embedment,
h
nom
in.
(mm)
Allowable Load
at c
cr
and s
cr
lbs
(kN)
Spacing Distance, s Edge or End Distance
Critical
Distance, s
cr
in.
(mm)
Minimum
Distance, s
min
in.
(mm)
Allowable Load
Factor at s
min
in.
(mm)
Critical
Distance, c
cr
in.
(mm)
Minimum
Distance, c
min
in.
(mm)
Allowable Load
Factor at c
min
Load
Perpendicular
to Edge or End
1/4
1-5/8
(41.3)
405
(1.8)
4
(101.6)
2
(50.8)
0.70
3-3/4
(95.3)
1-1/4
(31.8)
0.20
2-1/2
(63.5)
520
(2.3)
3/8
2
(50.8)
930
(4.1)
6
(152.4)
3
(76.2)
0.70
6
(152.4)
1-1/2
(38.1)
0.20
3-1/4
(82.6)
1,030
(4.6)
1/2
2-1/2
(63.5)
1,055
(4.7)
8
(203.2)
4
(101.6)
0.65
8
(203.2)
2-5/8
(66.7)
0.25
4-1/4
(108.0)
1,075
(4.8)
5/8
3-1/4
(82.6)
1,700
(7.6)
10
(254.0)
5
(127.0)
0.50
10
(254.0)
3-3/8
(85.7)
0.40
5
(127.0)
1,980
(8.8)
3/4
4
(101.6)
1,700
(7.6)
12
(304.8)
6
(152.4)
0.50
12
(304.8)
4
(101.6)
0.55
6-1/4
(158.8)
2,030
(9.0)
For SI: 1 inch = 25.4 mm; 1 lbs = 0.0044 kN, 1 psi = 0.006894 MPa.
1. All values are for anchors installed in minimum two-wythe, solid clay brick masonry walls conforming to ASTM C62, grade SW minimum. Mortar must be type N, S or M. The base material
must have a minimum compressive strength, f'm, of 2,000 psi (13.8 MPa). Allowable loads are based on a safety factor of 5.0.
2. Anchors may be installed in any location in the face of the masonry wall, provided the minimum edge and end distances are maintained.
3. Embedment is measured from the outside surface of the concrete masonry unit to the embedded end of the anchor.
4. The critical spacing distance, s
cr
, is the anchor spacing where full load values in the table may be used. The minimum spacing distance, s
min
, is the minimum anchor spacing for which values
are available and installation is permitted. Spacing distance is measured from the centerline to centerline between two anchors.
5. The critical edge or end distance, c
cr
, is the distance where full load values in the table may be used. The minimum edge or end distance, c
min
, is the minimum distance for which values are
available and installation is permitted. Edge or end distance is measured from anchor centerline to the closest unrestrained edge.
6. The tabulated values are applicable for anchors installed into wall openings where minimum edge distances are maintained.
7. Load values for anchors installed less than s
cr
and c
cr
must be multiplied by the appropriate load reduction factor based on actual spacing (s) or edge distance (c). Load factors are
multiplicative; both spacing and edge reduction factors must be considered.
8. Linear interpolation of load values between minimum spacing (s
min
) and critical spacing (s
cr
) and between minimum edge or end distance (c
min
) and critical edge or end distance (c
cr
) is permitted.