Straps & Ties
HRS/ST/PS/HST/HTP/LSTA/LSTI/MST/MSTA/MSTC/MSTI Strap Ties
Straps are designed to transfer tension loads in a wide variety of applications.
HRS—A 12 gauge strap with a nailing pattern designed for installation on the
edge of 2x members. The HRS416Z installs with Simpson Strong-Tie ® Strong-Drive ®
SDS Heavy-Duty Connector screws.
LSTA and MSTA—Designed for use on the edge of 2x members, with a nailing
pattern that reduces the potential for splitting.
LSTI—Light straps that are suitable where pneumatic-nailing is necessary
through diaphragm decking and wood chord open web trusses.
MST—Splitting may be a problem with installations on lumber smaller than 3 1⁄2";
either fill every nail hole with 10dx1 1⁄2" nails or fill every-other hole with 16d common
nails. Reduce the allowable load based upon the size and quantity of fasteners used.
MSTC—High Capacity strap which utilizes a staggered nail pattern to help minimize
wood splitting. Nail slots have been countersunk to provide a lower nail head profile.
MSTC28 shown
MSTA - 49
MSTC40, MSTC52, MSTC66, MSTC78 similar
FINISH: PS–HDG; HST3 and HST6–Simpson Strong-Tie® gray
paint; all others–galvanized. Some products are available
in stainless steel or ZMAX® coating; see Corrosion
Information, pages 13-15.
INSTALLATION: Use all specified fasteners. See General Notes.
OPTIONS: Special sizes can be made to order. Contact Simpson
Strong-Tie.
CODES: See page 12 for Code Reference Key Chart.
MSTC and RPS meet code requirements for reinforcing
cut members (16 gauge) at top plate and RPS at sill plate.
International Residential Code®– 2000/2006 R602.6.1
International Building Code®– 2000/2006 2308.9.8
(For RPS, refer to page 223.)
ST2115
ST9, ST12,
ST18, ST22
MSTC
ST
6"
Straps & Ties
3" HTP37Z
L
MSTI
MST
16"
HRS12
HRS8
HRS6
7"
HST
LSTI
31⁄4"
HRS
186
Typical MSTI Installation
(MIT hanger shown)
LSTI similar
Typical LSTI
Installation
Typical
HRS Installation
HRS416Z
C-C-2015 © 2015 SIMPSON STRONG-TIE COMPANY INC. PRINTED 12/14
LSTA and MSTA
(Pilot holes not shown)
Straps & Ties
HRS/ST/PS/HST/HTP/LSTA/LSTI/MST/MSTA/MSTC/MSTI Strap Ties
CODES: See page 12 for Code Reference Key Chart.
These products are available with additional corrosion protection. Additional products on
this page may also be available with this option, check with Simpson Strong-Tie for details.
2³⁄₈"
End Distance
These products are approved for installation with the Strong-Drive ®
SD Connector screw. See page 27 for more information.
LSTA9
LSTA12
LSTA15
LSTA18
LSTA21
LSTA24
ST292
ST2122
ST2115
ST2215
LSTA30
LSTA36
LSTI49
LSTI73
MSTA9
MSTA12
MSTA15
MSTA18
MSTA21
MSTA24
MSTA30
MSTA36
MSTA49
ST6215
ST6224
ST9
ST12
ST18
ST22
MSTC28
MSTC40
MSTC52
HTP37Z
MSTC66
MSTC78
ST6236
HRS6
HRS8
HRS12
MSTI26
MSTI36
MSTI48
MSTI60
MSTI72
HRS416Z
Ga
20
18
16
14
12
Dimensions
W
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
2 1⁄16
2 1⁄16
3
⁄4
2 1⁄16
1 1⁄4
1 1⁄4
3 3⁄4
3 3⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
2 1⁄16
2 1⁄16
1 1⁄4
1 1⁄4
1 1⁄4
1 1⁄4
3
3
3
3
3
3
2 1⁄16
1 3⁄8
1 3⁄8
1 3⁄8
2 1⁄16
2 1⁄16
2 1⁄16
2 1⁄16
2 1⁄16
3 1⁄4
Fasteners
(Total)
L
9
8-10d
12
10-10d
15
12-10d
18
14-10d
21
16-10d
24
18-10d
9 5⁄16
12-16d
12 13⁄16
16-16d
16 5⁄16
10-16d
16 5⁄16
20-16d
30
22-10d
36
24-10d
49
32-10dx1 1⁄2
73
48-10dx1 1⁄2
9
8-10d
12
10-10d
15
12-10d
18
14-10d
21
16-10d
24
18-10d
30
22-10d
36
26-10d
49
26-10d
16 5⁄16
20-16d
23 5⁄16
28-16d
9
8-16d
11 5⁄8
10-16d
17 3⁄4
14-16d
21 5⁄8
18-16d
28 1⁄4 36-16d sinkers
40 1⁄4 52-16d sinkers
52 1⁄4 62-16d sinkers
7
20-10dx1 1⁄2
65 3⁄4 76-16d sinkers
77 3⁄4 76-16d sinkers
33 13⁄16
40-16d
6
6-10d
8
10-10d
12
14-10d
26
26-10dx1 1⁄2
36
36-10dx1 1⁄2
48
48-10dx1 1⁄2
60
60-10dx1 1⁄2
72
72-10dx1 1⁄2
16 16-SDS 1⁄4"x1 1⁄2"
Allowable
Tension Loads
(DF/SP)
Allowable
Tension Loads
(SPF/HF)
(160)
740
925
1110
1235
1235
1235
1265
1530
660
1875
1640
1640
2975
4205
750
940
1130
1315
1505
1640
2050
2050
2020
2095
2540
885
1105
1420
1420
3455
4745
4745
1850
5860
5860
3845
605
1010
1415
2745
3800
5065
5080
5080
2835
(160)
635
795
950
1110
1235
1235
1120
1505
660
1875
1640
1640
2555
3830
645
810
970
1130
1290
1455
1820
2050
2020
1900
2540
760
950
1330
1420
2980
4305
4745
1600
5860
5860
3845
525
880
1230
2325
3220
4290
5080
5080
2305
Code
Ref.
Typical LSTA Installation
(Hanger not shown)
Bend strap one time only,
max 12/12 joist pitch.
I4, L3, L5, F2
Material Dim.
Bolts Code
Model
Thickness
Ref.
No.
Gauge W L Qty Dia
3
PS218
2 18 4
⁄4
7 ga
PS418
4 18 4 3⁄4 180
PS720
6 3⁄4 20 8 1⁄2
F2, L3, L5
I4, IL14, L3, L5, F2
I4, L3, L5, F2
1.PS strap design loads must be determined
by the Designer for each installation. Bolts
are installed both perpendicular and parallel to-grain. Hole diameter in the part may be
oversized to accommodate the HDG.
Designer must determine if the oversize
creates an unacceptable installation.
2.For allowable tension loads, see page 230.
Straps & Ties
C-C-2015 © 2015 SIMPSON STRONG-TIE COMPANY INC. PRINTED 12/14
Model
No.
Beam and Strap
I4, L3, L5, F2
L5
I4, L3, L5, F2
PS
L5, F26
I4, L3, L5, F2
170
1.Loads include a 60% load duration increase on the fasteners for wind or earthquake loading.
210dx1 1⁄2" nails may be substituted where 16d sinkers or 10d are specified at 100% of the table loads
except where straps are installed over sheathing.
3. 10d commons may be substituted where 16d sinkers are specified at 100% of table loads.
4.16d sinkers (0.148" dia. x 3 1⁄4" long) or 10d commons may be substituted where 16d commons are
specified at 0.84 of the table loads.
5.Use half of the nails in each member being connected to achieve the listed loads.
6.Tension loads apply for uplift when installed vertically.
7.NAILS: 16d = 0.162" dia. x 3 1⁄2" long, 16d Sinker = 0.148" dia. x 3 1⁄4" long, 10d = 0.148" dia. x 3" long.
1
⁄2 = 0.148" dia. x 1 1⁄2" long. See pages 22-23 for other nail sizes and information.
10dx1 Typical PS720 Installation
187
Straps & Ties
HST/MST/MSTC/MSTA Strap Ties
CODES: See page 12 for Code Reference Key Chart.
These products are approved for installation with the Strong-Drive ®
SD Connector screw. See page 27 for more information.
Floor-to-Floor Clear Span Table
MSTA49
MSTC28
MSTC40
MSTC52
MSTC66
MSTC78
MST37
MST48
Straps & Ties
MST60
MST72
Clear
Span
Fasteners
(Total)
Allowable Tension
Loads (DF/SP)
Allowable Tension
Loads (SPF/HF)
(160)
(160)
18
26-10d
2020
2020
16
26-10d
2020
2020
18
12-16d sinkers
1155
995
16
16-16d sinkers
1540
1325
24
20-16d sinkers
2310
1985
18
28-16d sinkers
2695
2320
16
32-16d sinkers
3080
2650
24
36-16d sinkers
3465
2980
18
44-16d sinkers
4235
3645
3975
16
48-16d sinkers
4620
30
48-16d sinkers
4780
4120
24
54-16d sinkers
5380
4640
18
64-16d sinkers
5860
5495
16
68-16d sinkers
5860
5840
30
64-16d sinkers
5860
5495
24
72-16d sinkers
5860
5860
18
76-16d sinkers
5860
5860
1495
24
14-16d
1725
18
20-16d
2465
2135
16
22-16d
2710
2345
24
26-16d
3215
2780
18
32-16d
3960
3425
16
34-16d
4205
3640
30
34-16d
4605
3995
24
40-16d
5240
4700
18
46-16d
6235
5405
30
48-16d
6505
5640
24
54-16d
6730
6345
18
62-16d
6730
6475
Nails are
not required
in the rim
board area.
Stitch nailing
of double studs
by others
an
r Sp
Clea
Typical Detail with Strap
Installed Over Sheathing
Floor-to-Floor Tie Installation
showing a Clear Span
These products are available with additional corrosion protection. Additional products on
this page may also be available with this option, check with Simpson Strong-Tie for details.
Model
No.
Dimensions
Allowable Tension Loads
(DF/SP)
Fasteners (Total)
Ga
Bolts
Bolts
Nails
Bolts
Dia
(160)
(160)
(160)
(160)
⁄2
3700
2165
3200
2000
⁄2
5080
3025
4480
2805
⁄2
5310
3675
5190
3410
⁄2
6730
4485
6475
4175
⁄2
6730
4485
6475
4175
⁄8
—
5220
—
4835
⁄8
—
10650
—
9870
⁄4
—
7680
—
6660
⁄4
—
15470
—
13320
L
Nails
2 1⁄16
27
30-16d
4
1
2 1⁄16
37 1⁄2
42-16d
6
1
MST48
2 1⁄16
48
50-16d
8
1
MST60
2 1⁄16
60
68-16d
10
1
2 1⁄16
72
68-16d
10
1
1
2 ⁄2
21 ⁄4
—
6
5
5
21 1⁄4
—
12
5
3
25 1⁄2
—
6
3
6
25 1⁄2
—
12
3
MST37
MST72
HST2
HST5
HST3
HST6
12
10
7
3
1
Qty
Allowable Tension Loads
(SPF/HF)
Nails
W
MST27
1.Loads include a 60% load duration increase on the fasteners for wind or earthquake loading.
2.Install bolts or nails as specified by Designer. Bolt and nail values may not be combined.
3.Allowable bolt loads are based on parallel-to-grain loading and these minimum member
thicknesses: MST–2 1⁄2"; HST2 and HST5–4"; HST3 and HST6–4 1⁄2".
4.Use half of the required nails in each member being connected to achieve the listed loads.
5.When installing strap over wood structural panel sheathing, use 2 1⁄2" long nail minimum.
6.Tension loads apply for uplift as well when installed vertically.
7.NAILS: 16d = 0.162" dia. x 3 1⁄2" long, 16d Sinker = 0.148" dia. x 3 1⁄4" long,
1
⁄2 = 0.148" dia. x 1 1⁄2" long. See pages 22-23 for other nail sizes and information.
10dx1 188
When nailing
the strap over
OSB/plywood,
use a 2 1⁄2" long
nail minimum.
Code
Ref.
I4,
L3, F2
C-C-2015 © 2015 SIMPSON STRONG-TIE COMPANY INC. PRINTED 12/14
Model
No.