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Hurricane Tie

Model: SH

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Hurricane Ties provide a positive connection between the truss/rafter and the wall of the structure to resist wind and seismic forces. These ties connect both solid-sawn and engineered timber across a wide range of applications. Some hurricane tie models are available with additional corrosion resistance for exterior and treated-timber applications.

The H1.81Z Hurricane Tie is designed for use with 45mm structural timber framing to provide a stronger connection between the top plate of the wall and rafter. It's ideal for connections when there are higher-load demands on the structure, like a heavy snow load, and provides lateral resistance in a seismic event. It also suits for bearer to joist connection in flooring and deck framing applications.

The H1.81Z installs with half the nails that are needed for two single-sided twist straps (like the H2.5A) and offers a higher lateral allowable load, making it a cost effective and higher-performing solution to tie down a rafter roof.

The H2.5A connects the truss/rafter to the top plate and is also suitable for joist to bearer connections. It is available in galvanised and stainless steel for extra corrosion protection. As part of a continuous load path, the H2.5A resists both lateral and uplift loads. The symmetrical design eliminates the need for separate right and left parts.

The H3 connects the truss/rafter to the top plate and is available in galvanised and stainless steel for extra corrosion protection. As part of a continuous load path, the H3 resists both lateral and uplift loads. 

The H6 wraps from the stud up and over the top plate for a high‑strength connection. It can also be used as a stud‑to‑band‑joist connection. H6 ties are supplied in pairs with equal quantities left- and right-hand models and can be installed in pairs.

Note: H3 and H6 ties come in pairs, with equal numbers of left-handed and right-handed models in each box. These ties can be installed in pairs.

Please check the Corrosion Information to see if it is suitable for your application.

Material
  • Carbon Steel 1.3mm thick: H1.81Z; H2.5A; H2.5ASS; H3; H3SS; S/H1A; S/H2.5
  • Carbon Steel 1.6mm thick: H6
Finish
  • ZMAX® Galvanised: H1.81Z
  • Z275 Galvanised: H2.5A; H3; H6; S/H1A; S/H2.5
  • 316 Stainless Steel: H2.5ASS; H3SS
Features & Benefits
  • Resists high winds and seismic forces
  • Provides a secure hold to help weather storms
  • H1.81 has a wider seat to fit 45 mm structural timber framing
  • Engineered swages for extra strength and to minimise deflections
  • Install in pairs on either side of the rafter/truss/joist to provide resistance to uplift and lateral forces
  • May be used for general tie purposes, strongback attachments, and as all-purpose ties where one member crosses another
  • H2.5A & H3 are available in 316 Stainless Steel for extra corrosion protection
  • S/H1A is designed for steel frame applications
  • Install with Simpson Strong-Tie 8d common nails or Strong-Drive SD screws
Installation
  • Use all specified fasteners 
  • Simpson Strong-Tie Stainless Steel connectors require stainless steel fasteners
  • Ties can be installed with flanges facing inward or outward
  • Hurricane ties do not replace solid blocking
Applications
  • Rafter/Truss/Joist tie down
  • Top Plate / Stud tie down
  • Decking Joist tie down
  • Structural timber framing
 
 
Model No. Table

Model No.

Fasteners
(No. — Length x Dia., mm)

Design Capacity (kN)

AU

Design Capacity (kN)

NZ

Rafter/Joist

Top Plates/Bearer

Stud

Uplift
k1 = 1.14

F1
k1 = 1.14

F2
k1 = 1.14

Uplift
k1 = 1.0

F1
k1 = 1.0

F2
k1 = 1.0

H1.81Z

6 – 38 x 3.75

4 – 38 x 3.75

—

2.25

2.23

1.29

1.86

1.84

1.07

H2.5A

5 – 38 x 3.32

5 – 38 x 3.32

—

2.35

0.49

0.48

2.32

0.49

0.48

H2.5ASS

5 – 38 x 3.32

5 – 38 x 3.32

—

1.88

0.34

0.34

1.85

0.34

0.34

H3

4 – 38 x 3.32

4 – 38 x 3.32

—

1.98

0.31

0.76

1.86

0.29

0.76

H3SS

4 – 38 x 3.32

4 – 38 x 3.32

—

1.34

0.31

0.76

1.26

0.29

0.76

H6

—

8 – 38 x 3.32

8 – 38 x 3.32

3.47

—

—

3.47

—

—
  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 test data and structural joint calculation.
  2. For Australia, the Capacity Factor (φ) is 0.85 for nails and screws for structural joints in a Category 1 application. Reduce tabulated values where other Category applications govern. For New Zealand, The Capacity Factor (φ) is 0.8 for nails.
  3. Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor (k1) where applicable. Capacities may not be increased.
  4. Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4.
  5. Allowable loads in the F1 direction are not intended to replace diaphragm boundary members or cross-grain bending of the truss or rafter members
  6. When cross-grain tension cannot be avoided in the members, mechanical reinforcement to resist such forces may be considered
  7. H1.81Z shown on the outside of wall assumes a min. overhang of 90mm. Installation on the inside of wall is acceptable with detailing for the uplift continuous load path by Designer.
  8. For parts installed on the outside of wall where only three plate fasteners can be accessed, reduce table loads by 0.75 for single part and 0.875 for two-part installations.

 

S/H1A Technical Data - Steel Frame 

Model No.

Fasteners

Truss Thickness mil (ga.)

Allowable Uplift Load (lb.)

Plate/Wall Stud Thickness mil (ga.)

Truss

Top Track

Stud

33 mil (20 ga.)

43 mil (18 ga.)

54 mil (16 ga.)

S/H1A

(4) #10

(3) #10

(1) #10

27 (22)

470

470

470

(4) #10

(3) #10

(1) #10

33 (20)

510

550

690

(4) #10

(3) #10

(1) #10

43 (18)

510

550

690

(4) #10

(3) #10

(1) #10

54 (16)

520

675

850

 

  1. Tabulated loads based on truss members with yield strength, Fy, of 50 ksi and tensile strength, Fu, of 65 ksi. Reduce tabulated load proportionally for lower truss member steel strength. For example: 43 mil (18 ga.) truss member with a yield strength, Fy, of 33 ksi and a tensile strength, Fu, of 45 ksi is connected to 43 mil top track and wall stud. The adjusted allowable load is then 550 lb. x minimum [33/ 50 or 45/ 65] = 363 lb.
  2. See Fastening Systems for more information on Simpson Strong-Tie fasteners.

 

S/H2.5 Technical Data - Steel Frame 

Model No.

Connector Material Thickness mil (ga.)

Fasteners

Allowable Uplift Load (lb.)

33 mil (20 ga.)

Truss / Rafter

Top Track

Stud

Uplift

Lateral

F1

F2

S/H2.5

43 (18)

(4) #10

—

(4) #10

390

90

125

 

  1. Loads are based on attachment of cold-formed steel members having a minimum thickness of 33 mil (20 ga.).
  2. Hurricane ties are shown installed on the outside of wall for clarity. Installation inside of wall is acceptable. For Continuous Load Path, connections in the same area must be on same side of wall.
  3. See Fastening Systems for more information on Simpson Strong-Tie fasteners.

 

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