Straps & Ties
HST/MST/MSTC/MSTA Strap Ties Nails are not required in the rim board area.
Floor-to-Floor Clear Span Table Model No.
MSTA49 MSTC28 MSTC40 MSTC52 MSTC66 MSTC78 MST37 MST48 MST60 MST72
Allowable Tension Allowable Tension Loads (DF/SP) Loads (SPF/HF)
Clear Span
Fasteners (Total)
18 16 18 16 18 16 18 16 18 16 18 16 18 16 18 16 18 16 18 16
26-10d 26-10d 12-16d sinkers 16-16d sinkers 28-16d sinkers 36-16d sinkers 44-16d sinkers 48-16d sinkers 64-16d sinkers 68-16d sinkers 76-16d sinkers 76-16d sinkers 20-16d 22-16d 32-16d 34-16d 46-16d 48-16d 46-16d 48-16d
(160) 2020 2020 1155 1540 2695 3465 4235 4620 5860 5860 5860 5860 2465 2710 3695 3695 4830 4830 4830 4830
(160) 2020 2020 995 1325 2320 2980 3645 3975 5495 5840 5860 5860 2135 2345 3425 3640 4830 4830 4830 4830
Stitch nailing of double studs by others
an r Sp Clea
When nailing the strap over OSB/plywood, use a 2 1⁄2" long nail minimum.
Typical Detail with Strap Installed Over Sheathing
Floor-to-Floor Tie Installation showing a Clear Span
CODES: See page 20 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.
Straps & Ties
Model No.
Dimensions
MST27 MST37 12 MST48 MST60 10 MST72 HST2 7 HST5 HST3 3 HST6
W
L
Nails
1
27 371⁄2 48 60 72 211⁄4 211⁄4 251⁄2 251⁄2
30-16d 42-16d 50-16d 68-16d 68-16d — — — —
2 ⁄16 21⁄16 21⁄16 21⁄16 21⁄16 21⁄2 5 3 6
Allowable Tension Loads (DF/SP)
Fasteners (Total)
Ga
Bolts Qty Dia 1 4 ⁄2 1 6 ⁄2 1 8 ⁄2 1 10 ⁄2 1 10 ⁄2 5 6 ⁄8 5 12 ⁄8 3 6 ⁄4 3 12 ⁄4
Nails (160) 3700 5080 5310 6730 6730 — — — —
Bolts (160) 2165 3025 3675 4485 4485 5220 10650 7680 15470
Allowable Tension Loads (SPF/HF) Nails (160) 3200 4480 5190 6475 6475 — — — —
Bolts (160) 2000 2805 3410 4175 4175 4835 9870 6660 13320
Code Ref.
I4, L3, F2
1. Loads include a 60% load duration increase on the fasteners for wind or earthquake loading. 2. 10d commons may be substituted where 16d sinkers are specified at 100% of the table loads. 3. 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. 4. Allowable bolt loads are based on parallel-tograin loading and these minimum member thicknesses: MST–2 1⁄2"; HST2 and HST5–4"; HST3 and HST6–4 1⁄2". 5. Use half of the required nails in each member being connected to achieve the listed loads. 6. Straps not installed over sheathing with 10d (0.148 dia. x 3) nails specified may be substituted with 10dx1 1⁄2 (0.148 dia. x 1 1⁄2) with no reduction in load. 7. Tension loads apply for uplift as well when installed vertically. 8. NAILS: 16d = 0.162" dia. x 3 1⁄2" long, 16d Sinker = 0.148" dia. x 3 1⁄4" long, 10dx1 1⁄2 = 0.148" dia. x 1 1⁄2" long. See page 24-25 for other nail sizes and information.
SA/HSA Strap Connectors A high value seismic tie for horizontal ties across intervening members. FINISH: SA36—Galvanized; HSA—Simpson Strong-Tie ® gray paint INSTALLATION: • Use all specified fasteners. See General Notes. • May not be suitable for floor diaphragms which protrude above beams. CODES: See page 20 for Code Reference Key Chart.
168
Allowable Horizontal Loads
Fasteners (Total)
Model No.
Strap Section
L
SA36 HSA32 HSA41 HSA50 HSA59 HSA68
12 ga x 21⁄16 3 ga x 3 3 ga x 3 3 ga x 3 3 ga x 3 3 ga x 31⁄2
36 32 41 50 59 68
Nails 22-16d — — — — —
Bolts Qty Dia 1 4 ⁄2 3 2 ⁄4 3 4 ⁄4 3 6 ⁄4 3 8 ⁄4 3 10 ⁄4
1. Allowable loads have been increased 60% for wind or earthquake loading with no further increase allowed; reduce where other loads govern. 2. Allowable loads assume a restrained member of 3 1⁄2" min. thickness with bolts in single shear. 3. Bolt and nail values may not be combined.
Nails (160)
Bolts (160)
1900 — — — — —
1900 2290 4520 6400 8330 10020
9"
15° Max .
Code Ref.
Typical HSA Installation
Hanger not shown
18° Max
Strap
9"
I15, L7
4. Only SA36 can be field-bent for other intermediate beam widths. 5. NAILS: 16d = 0.162" dia. x 3 1⁄2" long. See page 24-25 for other nail sizes and information.
Saddle Hanger
Typical SA Installation with Saddle Hanger
C-2011 © 2011 SIMPSON STRONG-TIE COMPANY INC. PRINTED 12/10
These products are approved for installation with the Strong-Drive SD StructuralConnector screw. See page 30 for the correct substitution and SD screw size.