Simpson Strong-Tie Wood Construction Connectors
Simpson Strong-Tie ® Wood Construction Connectors
Strap Ties (cont.) MST/MSTA/MSTC
Codes: See p. 11 for Code Reference Key Chart
These products are available with additional corrosion protection. For more information, see p. 14.
Many of these products are approved for installation with Strong-Drive ® SD Connector screws. See pp. 348–352 for more information.
Floor to Floor Span Table
Allowable Tension Loads (DF/SP)
Allowable Tension Loads (SPF/HF)
Clear Span (in.)
Fasteners (Total) (in.)
Model No.
(160)
(160)
Nails are not required in the rim board area
2,020 2,020 1,150 1,535 1,920 2,690 3,070 3,455 4,225 4,610 4,775 5,375 5,850 5,850 5,850 5,850 5,850 1,720 2,460 2,705 3,210 3,950 4,200 4,605 5,240 6,235 6,505 6,730 6,730
2,020 2,020
18 (26) 0.148 x 2 1/2 16 (26) 0.148 x 2 1/2 18 (12) 0.148 x 3 1/4 16 (16) 0.148 x 3 1/4 24 (20) 0.148 x 3 1/4 18 (28) 0.148 x 3 1/4 16 (32) 0.148 x 3 1/4 24 (36) 0.148 x 3 1/4 18 (44) 0.148 x 3 1/4 16 (48) 0.148 x 3 1/4 30 (48) 0.148 x 3 1/4 24 (54) 0.148 x 3 1/4 18 (64) 0.148 x 3 1/4 16 (68) 0.148 x 3 1/4 30 (64) 0.148 x 3 1/4 24 (72) 0.148 x 3 1/4 18 (76) 0.148 x 3 1/4 24 (14) 0.162 x 2 1/2 18 (20) 0.162 x 2 1/2 16 (22) 0.162 x 2 1/2 24 (26) 0.162 x 2 1/2 18 (32) 0.162 x 2 1/2 16 (34) 0.162 x 2 1/2 30 (34) 0.162 x 2 1/2 24 (40) 0.162 x 2 1/2 18 (46) 0.162 x 2 1/2 30 (48) 0.162 x 2 1/2 24 (54) 0.162 x 2 1/2 18 (62) 0.162 x 2 1/2
MSTA49
995
MSTC28
1,330 1,660 2,325 2,655 2,990 3,650 3,985 4,130 4,645 5,505 5,850 5,505 5,850 5,850 1,500 2,140 2,355 2,780 3,425 3,640 3,995 4,700 5,405 5,640 6,345 6,475
MSTC40
When nailing the strap over wood structural panel sheathing, use 2 ⁄ " long nail, minimum.
MSTC52
MSTC66
Sheathing not shown for clarity
MSTC78
End length Cu t
STHD shown
length
MST37
TOP OF SM1
TOP OF SM1
FORM ATTACHMENT HOLES EMBEDMENT LINE
FORM ATTACHMENT HOLES EMBEDMENT LINE
span
Clear
Nails not required in clear span
MST48
Typical Detail with Strap Installed over Wood Structural Panel Sheathing
End leng
th
MST60
MST72
Straps and Ties
Floor-to-Floor Tie Installation Showing a Clear Span
See footnotes below.
Dimensions (in.)
Fasteners (Total)
Allowable Tension Loads (DF/SP)
Allowable Tension Loads (SPF/HF)
Model No.
Code Ref.
Ga.
Bolts
Nails (160) 3,700
Bolts (160) 2,165
Nails (160) 3,210
Bolts (160) 2,000
W L
Nails (in.)
Qty.
Dia.
C-C-2021 ©2021 SIMPSON STRONG-TIE COMPANY INC.
27 (30) 0.162 x 2 1/2
4
MST27
2 1/16
1/2
37 1/2
(42) 0.162 x 2 1/2
6
5,070
3,030
4,495
2,800
MST37
2 1/16
12
1/2
IBC, FL, LA
MST48
2 1/16
48 (50) 0.162 x 2 1/2
8
5,310
3,675
5,190
3,395
1/2
MST60
2 1/16
60 (68) 0.162 x 2 1/2
10
6,730
4,490
6,475
4,150
1/2
10
MST72
2 1/16
72 (68) 0.162 x 2 1/2
10
6,730
4,490
6,475
4,150
1/2
1. See pp. 266–267 for Straps and Ties General Notes. 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 minimum member thickness: MST – 2 1/2 ". 4. Splitting may be a problem with installations on lumber smaller than 3 1/2 "; either fill every nail hole with 0.148" x 1 1/2 " nails or fill every other hole with 0.162" x 2 1/2 " nails. Reduce the allowable load based on the size and quantity of fasteners used. 5. Fasteners: Nail dimensions are listed diameter by length. See pp. 21–22 for fastener information.
270
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