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MSTC Diaphragm Tension Strap

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Product Details
MSTC78 Installation
MSTC78 Installation
MSTC78
MSTC78
MSTC78 Installation
MSTC78 Installation

The MSTC is designed to resist tension loads in timber-to-timber applications. This diaphragm tension strap tie utilizes a staggered nail pattern to help minimize timber splitting. The high-capacity MSTC also features countersunk nail slots for a lower nailing profile.

Material

Carbon Steel

Finish

Z275 Galvanised

Features & Benefits
  • Load-rated, precut strap designed for quick installation and optimal performance
  • Loads have been increased for wind and seismic forces
  • Floor-to-floor clear span application
Applications
  • Floor-to-Floor Tie Down
  • Diaphragm Tension Strap
Model No. Table
MSTC78 — Medium Strap Tie with Countersunk Nail Slots

Model No.

Dimensions (mm)

Nails (Total)
(mm)

Country

Characteristic Tension
Capacity (kN)

Design Tension Capacity (kN)

Thickness

W

L

MSTC78

2

76

1,975

76 – 3.75x64

AU

15.1

13.6 (K1=1.14)

NZ

12.9

11.6 (K1=1.0)
  1. Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the Australian Capacity Factor, or the NZ Strength Reduction Factor (Φ), and applicable the k modification factors following AS 1720.1 and NZS 3603 and (2) the Serviceability Capacity, which is the load at 3.2mm joint slip. Design Capacity is the minimum of steel and structural joint calculation.
  2. For Australia, the Capacity Factor (Φ) is 0.80 for nails and screws for structural joints in a Category 2 application. Change tabulated values where other Category applications govern. For NZ, the Strength Reduction Factor (Φ) is 0.80 for nails in lateral loading.
  3. Duration of Load Factor (k1) is as shown for wind and earthquake loading. Reduce Duration of Load Factor (k1) where applicable. Capacities may not be increased.
  4. The timber species design density for joint design is 480 kg/m3.
  5. See Straps and Ties General Notes.
  6. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.
 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - MSTC Diaphragm Tension StrapPDF icon Catalogue - Mass Timber Construction
Technical Data & Docs

Report Links

ESR-3096
ESR-2105
ER-124
FL10456

Warranty

Warranty

CAD Library

Download

jpg: 
Image icon MSTC78_Detail_Installation.jpg
dxf: 
Binary Data MSTC78_Detail_Installation.dxf
dwg: 
File MSTC78_Detail_Installation.dwg
PDF: 
PDF icon MSTC78_Detail_Installation.pdf

Download

jpg: 
Image icon MSTC_3D.jpg
RFA: 
Binary Data MSTC78_3D_Cad.rfa
Package icon Download Full Set (1.13 MB)
Masterspec
Alternative Products

Alternative Products

MDCST48 Installation

MDCST Diaphragm Tension Strap

Simpson Strong-Tie tested and load-rated tension straps and fasteners are designed to minimize cost and maximize speed and precision — while providing the strength, versatility and reliability you depend on.

LDSS48 installed with QD WSV75SA Collated Screws

LDSS Light Diaphragm Spline Strap for Mass Timber

The LDSS light diaphragm spline strap is designed to be placed directly on top of CLT (cross-laminated timber) and other mass timber panels to connect them together. Unlike plywood splines, the LDSS does not require routing.

Inspiration

Inspiration

MSTC78_Application_01.jpg

Request a Demo

Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

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Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

* Start typing address and select from the autocomplete.

Privacy policy

Structural Connections

 

Unmatched Quality from the Truss to the Foundation

With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Timber Connectors NZS 3604 Catalogue.

Timber Connectors

From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. Download the Timber Construction Connectors Catalogue (2016-2018).

Steel Frame Connectors

From fully tested and engineered connectors and clips Simpson Strong-Tie® provides comprehensive structural solutions for cold-formed steel construction. From steel-to-steel connections to full-scale lateral solutions and curtain wall connectors, we remain committed to developing new technology that helps to advance the cold-formed steel industry.

Find out how Simpson Strong-Tie timber connectors can help you build the right way every day. Download the Cold-Fromed Steel Construction Connectors Catalogue.