CPT Concealed Post Base Tie

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Product Details

CPT44Z

CPT44SS Stainless Steel

CPT Illustration

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.

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

Material

CPTZ - Carbon Steel; CPTSS - 316 Stainless Steel
2.7mm thick (base), 3.5mm thick (knife plate)

Finish

ZMAX^® Galvanised: CPTZ
316 Stainless Steel: CPTSS

Features & Benefits

Manufactured in heavier gauge steel for a stronger connection
The post support blade can be used as a template for location to drill dowel holes
Black powder coated base for a modern appearance
Tested and load-rated engineering data available
Suitable for Glulam and solid sawn timber
It can be installed with either mechanical or chemical anchors (dependant on engineering specifications)
Available in a range of sizes to suit 90mm, 115mm, 140mm and 190mm posts
The 90 mm size is also available in 316 Stainless Steel for for more corrosive environments such as coastal areas
All pins and fasteners needed for installation are included

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‑braced or non‑top‑supported installations
Anchorage Options:
The holes in the CPT tabs are sized for 12mm diameter anchors
For cast‑in‑place anchors, there should be 22mm (±3mm) of anchor above the top surface of the concrete

Model No. Table

Model No.	Post Size (mm) W x H	Dimensions (mm)		Material (mm)		Fasteners				Design Capacity (kN)
		W	L	Base Thickness	Knife Plate Thickness	Anchor		Dowel		Design Capacity (kN)
						Qty	Dia. (mm)	Qty	Dia. x L	Uplift k1 = 1.14	Download		F1 k1 = 1.14	F2 k1 = 1.14
						Qty	Dia. (mm)	Qty	Dia. x L	Uplift k1 = 1.14	Floor k1 = 0.69	Roof k1 = 0.77	F1 k1 = 1.14	F2 k1 = 1.14
CPT90Z	90 x 90 100 x 100	89	89	2.7	3.5	2	12	3	1/2" (12.7mm) x 70mm	13.5	47.5	53.0	2.7	3.4
CPT115Z	115 x 115	114	114							13.5	61.1	61.1	2.7	3.8
CPT140Z	140 x 140 152 x 152	137	137							20.4	109	109	2.9	4.6
CPT200Z	190 x 190 203 x 203	184	184							17.5	114	114	3.3	4.8
CPT90SS⁶	90 x 90 100 x 100	89	89							12.7	47.5	53.0	2.3	3.6

Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the Australian Capacity Factor, and applicable the k modification factors following AS 1720.1 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.
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.
Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor where applicable. Capacities may not be increased.
Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4.
CPTZs are supplied with three 1/2 inch diameter steel dowels. Alternate 12 mm diameter hex or square head machine bolts may be substituted and will achieve table loads.
CPTSS are supplied with three 1/2 inch diameter stainless steel dowels.
Lag or carriage bolts are not permitted.
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. Values in the table reflect installation into the wide face.
Downloads shall be reduced where limited by the capacity of the timber post.

Brochures & Catalogues

Brochures and Catalogues

Flyer - CPT Concealed Post Base Tie

Installation Guides

CPT Installation Guides

Technical Data & Docs

Technical Data Sheets

Technical Data Sheet - CPT

Report Links

ESR-1622

FL10865

Warranty

CAD Library

CPT_Detail_preview.jpg

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jpg:

dxf:

dwg:

PDF:

CPT200_3D_Preview.jpg

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jpg:

CPT_3D.jpg

RFA:

CPT200Z_3d_Cad.rfa

Download Full Set (2.44 MB)

Alternative Products

ABU Adjustable Post Base

The ABU Adjustable Post Base provides a high‑strength connection between the post and concrete.

Inspiration

CPT44Z_Application_01.jpg

CPT66Z_Application_01.jpg

CPT44SS_Application_01.jpg

Request a Demo

Request a Demo/Sample*

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CPT Concealed Post Base Tie