Onside Delivery
Onside Delivery
Buy now pay later with Afterpay
Buy now pay later with Afterpay
Main Menu
SHOP BY CATEGORY
HiTools Membership 100 days free Trial until 31/1/2025

PRICE MATCH

SEAMLESS WARRANTY SERVICE

FAST DELIVERY

HARDWARE SUPPORT

INSIDER REWARDS

HiTools Membership
PRICE MATCH
PRICE MATCH
SEAMLESS WARRANTY SERVICE
SEAMLESS WARRANTY SERVICE
FAST DELIVERY
FAST DELIVERY
HARDWARE SUPPORT
HARDWARE SUPPORT
INSIDER REWARDS
INSIDER REWARDS

Simpson HTT4 Tension Tie Holdown 300MM

$15.00 inc. GST

PRICE MATCH
SparePartsNEW1-1_1200x668

Availability: 103 in stock

SKU: 707392894605 Category:
Hitools is an authorized Milwaukee，Maita，Dewalt, Hikoki retail and whole sale dealer as well as wareanty repair center. Join Hitools Members spending only $99+G per year and enjoy the cost sale of all the power tools and 20% further discount for building materials. Festool is also available with membership price. Email to [email protected] or seach HTPM to purchase the special service, become Hitools members and save more.
Buy Hitools Membership

Simpson HTT4 Tension Tie Holdown 300MM

Simpson Strong‑Tie offers a wide variety of holdown devices designed and tested to address many applications and load demands. The HTT Tension Tie & Holdown is designed for heavy‑duty holdown applications on single or double studs and offer a solution for resisting tension loads. 

The heavy‑duty HTT is ideal for retrofit or new construction projects. They provide high-strength, post-pour, concrete-to-steel connections. The HTT is also suitable for residential and commercial projects, sub diaphragm floor, seismic upgrades, mid floor vertical connection applications. 

The HTT is a single-piece formed tension tie — no rivets, no welding points and a 4-ply formed seat. No washers are required. They feature an optimized nailing pattern which results in better performance with less deflection.

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

Material

Carbon Steel 3.1mm thick

Finish

Z275 Galvanised

Features & Benefits
  • A single piece folded and no weak point of welding, provide ultimate strength tension tile
  • Unique nailing pattern that provides better results with less deflection
  • Stronger and safer than typical through-bolt installations for deck post connections
  • Uses Strong-Drive® SD Connector screws which install easily, reduce fastener slip and provide a greater net section area of the post compared to bolts
  • Suitable for heavy duty holdown applications on single or double studs
  • Helps prevent a common type of deck failure
  • 17mm diameter anchor hole can accommodate Simpson Strong-Tie M12 Titen HD Screw Anchor or any M16 threaded rods
  • HTT5 and HTT5KT are suitable for steel frame holdown connections
Installation
  • Use all specified fasteners
  • The HTT requires no additional washer
  • Strong‑Drive SD Connector screws install best with a low speed high torque drill with a 3/8” hex head driver
Applications
  • Heavy‑duty holdown applications
  • Resisting tension load applications 
  • Shearwalls, studs to foundation connections
  • Concrete-to-steel connections
  • Retrofit or new construction projects
  • Residential and commercial projects
  • Sub diaphragm floor, seismic upgrades, mid floor vertical connection applications
  • Engineered Wood Products (EWP)
  • Cross-Laminated Timber (CLT) 
  • Steel Frame Holdown
Model No. Table

Model No.

Dimensions (mm)

Fasteners

Minimum Timber Member Size (Depth x Breadth, mm)

Country

Design Tension Capacity (kN)

Strap
Thickness

W

H

B

CL

Anchor Hole Dia (mm)

Post (Nails: No. – Length x Dia., Screws: No. – Dia. x Length, mm)

HTT4

3.1

65

315

60

33

16

18 – 38 x 3.75

140 x 38

AU

k1 = 1.14

15.30

NZ

k1 = 1.0

14.40

90 x 75

AU

k1 = 1.14

18.38

NZ

k1 = 1.0

17.05

18 – SD#10 x 38

140 x 38 or 90 x 75

AU

k1 = 1.14

23.04

NZ

k1 = 1.0

18.97

HTT5

3.1

65

405

60

33

16

26 – 38 x 3.75

90 x 75

AU

k1 = 1.14

20.44

NZ

k1 = 1.0

17.05

26 – SD#10 x 38

140 x 38

AU

k1 = 1.14

28.91

NZ

k1 = 1.0

21.31

HTT22E

3.1

63

558

60

33

18.5

–

–

AU

k1 = 1.14

–

NZ

k1 = 1.0

–

–

–

AU

k1 = 1.14

–

NZ

k1 = 1.0

–

HTT5KT

HTT5 Tension Tie Kit: includes BP 5⁄8–1 bearing plate washer and 26–SD #10×2 1⁄2 screws.

 

  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 6.4mm joint slip, which includes fastener slip, anchor elongation and holdown deformation. 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 NZ, the Strength Reduction Factor (φ) is 0.80 for nails in lateral load and 0.70 for other fasteners.
  3. Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor 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 and New Zealand Joint Group J5 per NZS 3603 Table 4.1.
  5. The Designer must specify anchor bolt type, length and embedment. Fasteners for the HTT4 are sold separately.
  6. Anchor bolt nut should be finger tight plus 1/3 to 1/2 turn with a hand wrench. Care should be taken not to over-tighten the nut.
  7. Post or beam design by Designer. Posts may consist of multiple members provided they are connected independently of the holdown fasteners.
  8. Structural composite timber columns have sides that either show the wide face or the edges of the timber strands/ veneers, known as the narrow face.
  9. Simpson Srong-Tie stainless-steel connectors require stainless-steel fasteners. Values in the table reflect installation into the wide face.
  10. Holdowns and tension ties are for use in vertical or horizontal applications.
  11. Holdowns and tension ties may be installed raised up to 460mm above the top of the concrete with no load reduction, provided that additional elongation of the anchor rod is taked into account.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

You May Like

Related Products

Price Match

If you find a lower price on a stocked item from another retailer, let us know, and we will match the price. You will also receive a further $5 voucher as a reward for your help.

Hitools is selling all the power tools with cost and repair as authorized warranty repair center. We look after our loyalty customers. All the customers purchasing Hitools members will be invited to our internal portal. 

If we find you are using our price to match in other retailers，we will abondon your membership forever.