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Simpson Strong-Tie CPT66Z 133mm x 133mm

Concealed Post Base Pre-Galvanised

Simpson Strong-Tie

Product Code: 78CPT66Z

Model Code: CPT66Z

Brand: Simpson Strong-Tie


From £23.69 inc VAT ( Priced Each )

(Include VAT?)   

Quantity:
 
60 IN STOCK
Sorry! This product is only sold in multiples of 0.
BULK QUANTITY DISCOUNTS:
Qty Price Per Unit Price Per 1 Units
1 - 4 25.8360 £25.84
5+ 23.6880 £23.69
Prices inc VAT based on Each
Order by 2pm for Next Day Delivery (Mon-Fri)
Delivery Icon FREE Standard Delivery on Orders over £100*




STRUCTURAL TIMBER CONNECTORS / CONCEALED POST BASES

Simpson Strong-Tie CPT66Z Concealed Post Base (133mm x 133mm)

The Simpson Strong-Tie CPT66Z is a premium, high-capacity structural connector designed to deliver a completely concealed, clean architectural finish for heavy timber columns. Engineered for post sizes from 133x133mm up to 150x150mm, it utilizes an internal steel flitch plate tucked into a pre-cut 5mm slot within the base of the timber. Providing a critical 25mm stand-off isolation height above the ground foundation substrate, it effectively breaks capillary moisture tracking paths to eliminate fungal decay risks. The visible standoff base plate features an additional textured, flat black powder coat finish for high-end aesthetic value, making it perfect for visible structural framing in Service Class 3 outdoor applications.

CRITICAL STRUCTURAL SPECIFICATION: LATERAL RESTRAINT MANDATE

Like all standard stand-off structural supports, the CPT66Z operates strictly as a pinned structural connection. It is engineered exclusively to resist vertical axial loads, tension uplift, and multi-directional horizontal shear forces—it is not designed to withstand bending moments or rotational momentum. To maintain structural integrity, the top of the timber post must be rigidly secured via an approved lateral restraint configuration (such as floor diaphragms, cross-bracing, or braced beam structures).

Click here to read our industrial engineering guide on why lateral restraint is required.


TECHNICAL SPECIFICATION DRAWING & KEY DIMENSIONS

Simpson Strong-Tie CPT66Z concealed post base structural dimension diagram technical drawing
Key Dimension Description CPT66Z Value
A Internal Flitch Plate Width 133 mm
B Internal Flitch Plate Length 133 mm
C Concealed Flitch Insertion Height 145 mm
F Base Ground Standoff Height 25 mm
H Exposed Standoff Base Footprint 114 mm
t1 Flitch Plate Metal Thickness 3.5 mm
t2 Standoff Base Metal Thickness 2.7 mm

TECHNICAL DATA & DESIGN CAPACITIES

Specification Parameter Engineered Values & Materials
Base Footprint Dimensions Compact 114mm footprint matching dressed 133-150mm posts
Stand-Off Ground Clearance 25mm clean architectural isolation zone
Material Composition Pre-galvanised steel plate internally; mechanically galvanised Ø13mm dowels
Corrosion Protection Grade Pre-galvanised & flat black powder coat finish (Optimized for Outdoor Service Class 3 exposures)
Characteristic Capacities R1,k (Compression) = 91.2 kN | R2,k (Uplift) = 16.3 kN | R3,k (Lateral) = 9.1 kN | R4,k = 5.6 kN (C24 Timber)
Fastener Requirements (Timber) Requires 3 No. Ø13mm x 120mm mechanically galvanised dowel pins (included)
Fastener Requirements (Concrete) Requires 2 No. M12 structural concrete resin anchors / fixing bolts

KEY STRUCTURAL PERFORMANCE ADVANTAGES

  • Concealed Architectural Finish: Internal flitch plate slots seamlessly inside the column body, keeping hardware out of sight for pristine timber aesthetics.
  • High Load Capacities: Formidable multi-plane resistance ratings defined across R1,k (91.2 kN compression) and R2,k (16.3 kN uplift tension).
  • Flat Black Powder Coating: The visible 25mm standoff plate boasts a premium flat black powder coat texture, blending luxury design with heavy protection.
  • Certified Structural Security: Full CE and ETA documentation alignment ensuring absolute engineering performance reliability on high-spec building sites.
Purchase CPT66Z Post Bases & Fixing Kits
Data Sheet
Data Sheet
Declaration of Performance
Declaration of Performance
Environmental Product Declarations (EPD)
Environmental Product Declarations (EPD)


Logistics Excellence

Fast, Reliable Delivery Nationwide

Delivering structural fixings, builders metalwork, tools, and site essentials straight to your project via our dedicated regional fleet and nationwide carrier partners.

TRUCK

DPD Pickup Point

Flexible

Collect small tool boxes, boxed fixings, and hardware from thousands of local shops and 24/7 lockers on your own schedule.

Flat Rate £5.95 + VAT
Greener, lower-cost collection with zero waiting on site.

Direct Site Delivery

Direct dispatch to your commercial site, project boundaries, or workshop door across the UK mainland via tracked road freight.

Standard Rate £9.95 + VAT
FREE Standard Shipping on qualifying orders over £100!

Next Day Dispatch

Urgent material requirements. Stock items are priority-picked, packed, and assigned to rapid-transit freight networks.

Order Cut-Off Order by 2:00 PM (Mon–Fri)
Fast-tracked transit for critical construction path deadlines.
New Service Available

Introducing DPD Pickup: Collect at Your Convenience

While our dedicated Metro vehicle fleet carries out routine site deliveries across London and the Home Counties, nationwide deliveries outside our van radius travel via DPD. Don't want to wait around on site or pay £9.95 courier carriage for a few packs of fixings? Choose DPD Pickup Point Collection at checkout to pick up your order locally from £5.95 + VAT.

Active construction site framing and rapid transit transport delivery truck keeping builds moving

How We Keep Your Builds Moving

We operate our own dedicated logistics vans out of Luton alongside leading national freight carriers, ensuring full trace visibility from our warehouse shelves straight to site.

01.
Instant Hub Sorting: Approved orders pass straight to active pick queues via our localised automated barcode stock framework.
02.
Heavy Component Packing: Structural products are safely stored in industrial reinforced cartons or strapped securely to pallets to fully safeguard fine threads and anti-corrosion zinc surfaces.
03.
Tailgate On-Site Offloading: Bulk shipments drop cleanly at your structural site boundary line via integrated tail-lift carrier transport systems.

Logistics Scope & Out-Of-Zone Shipments

Standard courier pricing arrays map explicitly to structural mainland UK postal grids. Supplementary transit routing variables, variable lead times, or specialised carrier adjustments apply across high-altitude or outlying maritime zones:

  • Scottish Highlands & Islands: Postcode structures matching KW, IV, PA, and PH configurations map to alternative transit grids. Please review checkout calculations for accurate real-time weights.
  • Northern Ireland, Isle of Man & Channel Islands: Water-crossing logistical paths require clean custom manifesting lines.
  • Heavy Oversized Pallets: Extended multi-ply girder connectors, structural space straps, 3m channel unistrut, or high-volume masonry hangers pass through dedicated heavy haulage grids.
NEED SPECIFIC AM DELIVERY TIMES OR TIMED SITE COORDINATION? If your project features demanding time windows, unique site access restrictions, or crane offload coordination, contact our central logistics desk directly on 01707 375172 or email your schedule over to finalise arrangements.
Commercial & Trade Governance

General Terms & Conditions of Sale

Standard trading terms governing trade accounts, component supply contracts, delivery obligations, and commercial agreements with Metro Fixings Ltd.

LEGAL
Credit Account Terms

Commercial credit accounts are strictly payable 30 days end of month following invoice date, subject to approved credit limit boundaries.

Title Retention

Full legal title and ownership of all supplied hardware remains with Metro Fixings Ltd until all outstanding invoices are cleared in full.

Site Logistics

Delivery schedules are provided in good faith. The buyer is responsible for arranging safe offloading facilities at the designated site location.

Notice of Claims

Consignment shortages or damaged goods must be recorded on delivery notes and formally reported to our trade desk within 24 hours.

1. Contract Formation & Quotations

All contracts entered into with Metro Fixings Ltd incorporate these Terms and Conditions of Sale to the exclusion of all other terms, including any buyer purchasing conditions:

  • Quotations issued by Metro Fixings Ltd constitute an invitation to treat and remain valid for 30 days unless formally withdrawn or adjusted prior to written acceptance.
  • Orders placed by telephone, email, or web portal are binding only upon written confirmation or dispatch of goods from our distribution hubs.
  • Bespoke fabrications, custom-threaded components, or non-catalogue items sourced specifically for site requirements cannot be cancelled once manufacturing or procurement has commenced.

2. Pricing, Invoicing & Credit Terms

Price Variances: Prices are quoted exclusive of UK VAT and delivery charges. We reserve the right to revise prices prior to dispatch to reflect raw material fluctuations or transport cost increases.
Credit Accounts: Approved trade credit accounts operate on strict 30 days net terms (payable by the end of the month following the invoice date).
Late Settlement: Overdue account balances incur statutory interest under the Late Payment of Commercial Debts Act at 8% above the Bank of England base rate, alongside recovery administration costs.

3. Delivery, Risk & Site Access

Deliveries are conducted via our fleet or accredited courier transport under the following conditions:

  • Delivery Dates: Target arrival dates are provided as estimates. Metro Fixings Ltd accepts no liability for direct or indirect losses, site delay penalties, or standing time costs caused by transit disruptions.
  • Risk Transfer: Risk of damage or loss passes to the buyer upon completion of delivery offloading at the designated site coordinates or trade counter collection.
  • Site Unloading: The customer must ensure safe site access and adequate mechanical unloading gear (forklifts or site teams) for bulk pallets or heavy structural fixings.

4. Retention of Title

Legal and beneficial title to all supplied goods remains with Metro Fixings Ltd until the customer has paid for them in full, together with all other sums due on any account. Until title passes, the buyer must store the goods separately, identifiable as Metro Fixings Ltd property, and keep them fully insured.

5. Warranties & Limitation of Liability

We warrant that goods conform to manufacturer specifications and relevant UK engineering compliance standards. Our liability for defective items is limited strictly to replacement or credit value refund. Under no circumstances shall Metro Fixings Ltd be liable for loss of profit, operational downtime, or indirect consequential damage.

Commercial Accounts Desk

Trade Account Support

Need to discuss credit terms, request statement copies, or query an invoice line?

Call our accounts office directly on 01707 375172 or email sales@metrofixings.co.uk.
Registered Trading Office
Metro Fixings Ltd
Unit 14 Windmill Trading Estate
Thistle Road, Luton
Bedfordshire, LU1 3XJ

Company Reg: 08434688
VAT Number: GB 158 5347 18
Governing Jurisdiction: All commercial contracts and disputes shall be governed by and construed in accordance with English Law, subject to the exclusive jurisdiction of the Courts of England & Wales.

Our Address

Metro Fixings Ltd
Unit 14 Windmill Trading Estate, Thistle Road
Luton, Bedfordshire

Contact Details

Telephone: 01707 375172
Fax: No Fax
Email: sales@metrofixings.co.uk