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HRS/ST/PS/HST/LSTA/LSTI/MST/MSTA/MSTC/MSTI
Strap Ties

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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. NEW! The HRS416Z installs with Simpson Strong-Tie® Strong Drive® screws (SDS).

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.

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.

Installation: Use all specified fasteners. See General Notes.

Options: Special sizes can be made to order. Contact Simpson Strong-Tie.

Codes: 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

See RPS.


top Gallery:
MSTI        

  MST          

  LSTI        

  LSTA and MSTA       
(Pilot holes not shown)         

  ST        

  ST9, ST12, ST18, ST22        

         
 
  roll over images below to see larger image
 
MSTC28 ST2115 HTP37Z HST
 
HRS HRS416Z Typical MSTI Installation
(MIT hanger shown)
LSTI similar
 
   
Typical LSTI Installation Typical HRS Installation    
 
  roll over images below to see larger image
 
Typical LSTA Installation (hanger not shown)
Bend strap one time only


 
PS   Typical PS720 Installation
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.

 
  roll over images below to see larger image
 
Typical Detail with Strap Installed Over Sheathing
  Floor-to-Floor
Tie Installation showing a Clear Span

top Floor-to-Floor Clear Span Table:
Table
  1. Loads include a 60% load duration increase on the fasteners for wind or earthquake loading
  2. 10dx1 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. 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".
  5. 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.
  6. Use half of the nails in each member being connected to achieve the listed loads.
  7. Tension loads apply for uplift when installed vertically.
  8. 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,
    10dx1 1/2 = 0.148" dia. x 1 1/2" long. See other nail sizes and information.

top Load Tables: See code report listings below

Table
  1. Loads include a 60% load duration increase on the fasteners for wind or earthquake loading
  2. 10dx1 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,
    10dx1 1/2 = 0.148" dia. x 1 1/2" long. See other nail sizes and information.
Table
  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-to-grain 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 other nail sizes and information.

top Code Reports (PDFs):
Legacy Reports
  IAPMO ES ER ICC-ES ESR CITY OF LOS ANGELES STATE OF FLORIDA ICC-ES NER ICC-ES ER ICC-ES ES
HRSSee specific model numbers for code listings.
HRS12      FL11470      
HRS416ZNo code listing: Please contact us for test data.
HRS6      FL11470      
HRS8      FL11470      
HSTSee specific model numbers for code listings.
HSTSee specific model numbers for code listings.
HST2  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
HST3  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
HST5  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
HST5-4 No code listing. Please contact us for test data.
HST6  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
HST6-41/2 No code listing. Please contact us for test data.
HTP37ZNo code listing: Please contact us for test data.
LSTASee specific model numbers for code listings.
LSTA12  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA15  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA18  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA21  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA24  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA30  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA36  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTA9  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
LSTISee specific model numbers for code listings.
LSTI49  ESR-2105 / ESR-2523 * RR25713 FL10852      
LSTI73  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTSee specific model numbers for code listings.
MSTSee specific model numbers for code listings.
MST21/2 No code listing. Please contact us for test data.
MST27  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MST37  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MST48  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MST60  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MST72  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTASee specific model numbers for code listings.
MSTA12  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA12SSNo code listing: Please contact us for test data.
MSTA12Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA15  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA15Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA18  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA18SSNo code listing: Please contact us for test data.
MSTA18Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA21  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA21Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA24  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA24SSNo code listing: Please contact us for test data.
MSTA24Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA30  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA30Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA36  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA36SSNo code listing: Please contact us for test data.
MSTA36Z  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTA49  ESR-2105 / ESR-2523 *   FL11470      
MSTA9  ESR-2105 / ESR-2523 * RR25149 / RR25713 FL10852      
MSTAM24ZNo code listing: Please contact us for test data.
MSTAM36ZNo code listing: Please contact us for test data.
MSTCSee specific model numbers for code listings.
MSTCSee specific model numbers for code listings.
MSTC28  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC28  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC40  ESR-2105 / ESR-2523 * RR25713 FL10852 / FL11473      
MSTC40  ESR-2105 / ESR-2523 * RR25713 FL10852 / FL11473      
MSTC52  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC52  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC66  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC66  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC78  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTC78  ESR-2105 / ESR-2523 * RR25713 FL10852      
MSTISee specific model numbers for code listings.
MSTISee specific model numbers for code listings.
MSTI26  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI36  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI36  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI48  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI48  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI60  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI60  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI72  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
MSTI72  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
PSSee specific model numbers for code listings.
PS218No load capacity: Products not tested or submitted because they’re not load rated and code approval not required.
PS418No load capacity: Products not tested or submitted because they’re not load rated and code approval not required.
PS720No load capacity: Products not tested or submitted because they’re not load rated and code approval not required.
STSee specific model numbers for code listings.
ST12  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
ST18  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
ST2115  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST2122  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST22  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      
ST2215  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST292  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST6215  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST6224  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST6236  ESR-2105 / ESR-2523 * RR25119 / RR25713 / RR25489 FL10852   ER-5275  
ST9  ESR-2105 / ESR-2523 * RR25119 / RR25713 FL10852      

* ESR-2523 is an Index of many of Simpson Strong-Tie Stamped and Welded Cold-formed Steel Products for Wood or Cold-formed Steel Construction

   
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