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ABU Adjustable Post Base

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Product Details
ABU44Z
ABU44Z
ABU44SS
ABU44SS
ABU44 Illustration
ABU44 Illustration
ABU66Z
ABU66Z
ABU66Z Illustration
ABU66Z Illustration

The ABU Adjustable Post Base provides a high‑strength connection between the post and concrete. Designed to install on hardened concrete with either a cast‑in‑place or post‑installed anchor, the ABU is designed to provide strong uplift performance for areas where uplift from high winds is a concern. It's stand-off base keeps the timber away from standing moisture which is especially important when using laminated posts.

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

Material & Finish
  • Carbon Steel ZMAX® Galvanised: ABU44Z; ABU66Z
  • 316 Stainless Steel: ABU44SS
Features & Benefits
  • The slotted base enables flexible positioning around the anchor bolt, making precise post placement easier
  • The 25mm standoff meets code requirements and helps prevent rot at the end of the post in applications where weather or moisture are present
  • ZMAX® galvanisation offers extra corrosion resistance for exterior and preservative‑treated timber applications
  • Available in 316 Stainless Steel for more corrosive environments such as coastal areas
  • The post can be fastened with either nail, bolts or Strong‑Drive® SD Connector screws
Installation
  • Use all specified fasteners
  • Post bases do not provide adequate resistance to prevent 
  • members from rotating about the base and therefore are not recommended for non‑top supported installations (such as fences or unbraced carports)
Model No. Table

Model No.

Post Size (mm)

Material
(mm)

Dimensions
(mm)

Fasteners

Country

Design Capacity (kN)

Base Thickness

Strap Thickness

W

L

H

HB9

Anchor Dia (mm)

Nails
(No. – Length x Dia., mm)

Bolts
(No. – Dia., mm)

Uplift

Download10

Nails

Bolts

Floor

Roof

ABU44Z

90 x 90

1.6

2.7

90

75

140

45

16

12 – 75 x 3.75

2 – M12

AU

k1 = 1.14

k1 = 1.14

k1 = 0.69

k1 = 0.77

10.23

8.66

36.20

36.20

NZ

k1 = 1.0

k1 = 1.0

k1 = 0.80

k1 = 0.80

10.23

8.66

34.07

34.07

ABU44SS

90 x 90

1.6

2.7

90

75

140

45

16

12 – 75 x 3.75

2 – M12

AU

k1 = 1.14

k1 = 1.14

k1 = 0.69

k1 = 0.77

7.05

6.48

38.74

38.74

NZ

k1 = 1.0

k1 = 1.0

k1 = 0.80

k1 = 0.80

6.64

6.48

36.46

36.46

ABU66Z

140 x 140

2.7

3.5

140

125

155

45

16

12 – 75 x 3.75

2 – M12

AU

k1 = 1.14

k1 = 1.14

k1 = 0.69

k1 = 0.77

7.15

8.68

70.66

70.66

NZ

k1 = 1.0

k1 = 1.0

k1 = 0.80

k1 = 0.80

6.73

7.15

66.50

66.50
  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 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. Specifier to design concrete for uplift capacity.
  6. 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. Fasteners should be installed in the wide face.
  7. Simpson Strong-Tie stainless-steel connectors require stainless-steel fasteners.
  8. HB dimension is the distance from the bottom of the post up to the first bolt hole.
  9. Downloads shall be reduced where limited by the capacity of the timber post.
 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - ABU Adjustable Post Base
Installation Guides

Installation Guides

PDF icon ABU Installation Guides
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - ABU

Report Links

ESR-1662
ESR-3096
FL10860

Warranty

Warranty

CAD Library

Download

jpg: 
Image icon ABU_Detail_Beam-Installation.jpg
dxf: 
Binary Data ABU_Detail_Beam Installation.dxf
dwg: 
File ABU_Detail_Beam Installation.dwg
PDF: 
PDF icon ABU_Detail_Beam Installation.pdf

Download

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

Download

jpg: 
Image icon ABU44_3D.jpg
RFA: 
Binary Data ABU44_3d_Cad.rfa

Download

jpg: 
Image icon ABU66_3D.jpg
RFA: 
Binary Data ABU66_3d_Cad.rfa
Package icon Download Full Set (1.47 MB)
Alternative Products

Alternative Products

CPT44Z

CPT Concealed Post Base Tie

The CPT Concealed Post Base provides a clean look to expose the natural beauty of the timber.

Reduce the potential of timber decay at the post end with a 25 mm standoff.

Inspiration

Inspiration

ABU44Z_Application_01.jpg

ABU44SS_Application_01.jpg

ABU44Z_Application_02.jpg

ABU44Z_Application_03.jpg

ABU66Z_Application_01.jpg

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Experience the innovation of Simpson Strong-Tie 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 provide you a demo and/or send you samples*.

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