# Koelner D-TU-121 Bolt-Down Post Support 121 mm

**URL:** https://aio.lv/en/product--koelner-d-tu-121--12319159
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Fencing & Barriers
**Manufacturer:** Koelner
**Manufacturer code:** D-TU-121
**EAN:** 5906675431628
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 57.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 47.51 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-d-tu-121--12319159

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The Koelner D-TU-121 is a high-quality bolt-down post support designed for stable and secure mounting of wooden posts to concrete surfaces. With a 121 mm diameter, this steel support provides excellent structural integrity for fences, pergolas, and garden structures. Its durable construction ensures long-lasting performance and resistance to environmental factors, making it an essential component for professional construction and DIY landscaping projects.

## Long description

The Koelner D-TU-121 bolt-down post support is a robust hardware solution engineered for the reliable anchoring of wooden posts to concrete foundations. Designed with a 121 mm diameter, this support provides a stable base for various timber structures, ensuring that posts remain upright and secure against lateral forces. Its heavy-duty steel construction is optimized for outdoor use, offering the necessary strength to support fences, pergolas, and other garden architecture while maintaining structural integrity over time.
Advantages
This post support offers exceptional durability due to its high-quality steel composition, which is designed to withstand the rigors of outdoor environments. The bolt-down design facilitates a straightforward installation process on existing concrete surfaces, eliminating the need for deep excavation or complex foundation work. By elevating the wooden post slightly above the ground, the support helps minimize direct contact with moisture, thereby reducing the risk of rot and extending the service life of the timber. Its precise engineering ensures a tight fit, providing consistent stability for both professional construction projects and residential landscaping tasks.
Suitable for
Mounting wooden fence posts to concrete bases
Constructing pergolas and garden gazebos
Installing timber supports for carports
Securing garden structures and decorative wooden elements
This product may not be suitable for installation on unstable, cracked, or crumbling concrete surfaces, as these materials cannot provide the necessary pull-out resistance for the anchor bolts. It is also not intended for use in highly corrosive environments, such as areas directly exposed to salt spray or constant chemical contact, without additional protective coatings.
Key specifications
Diameter: 121 mm
Material: Durable steel
Mounting type: Bolt-down
Application: Concrete surfaces
To install the Koelner D-TU-121, first position the support on the concrete surface and mark the drilling holes. Use a masonry drill bit to create holes of the appropriate diameter and depth as required by your chosen anchor bolts. Clean the dust from the holes, insert the anchors, and secure the support firmly to the concrete. Once the base is fixed, insert the wooden post into the support and fasten it securely using appropriate wood screws or bolts through the pre-drilled side holes.
What to consider before purchase
Verify that the post diameter matches the 121 mm support size
Ensure the concrete surface is level and structurally sound
Check that you have the correct type of concrete anchors for your specific surface
Confirm the load-bearing requirements of your project
For optimal performance and longevity, ensure that the wooden post is dry before installation and consider applying a wood preservative to the base of the post to further protect it from moisture. Regularly inspect the bolts and the concrete base for any signs of loosening or degradation to maintain long-term safety.

## FAQ

### How much does the Koelner D-TU-121 Bolt-Down Post Support 121 mm cost, and is it available for purchase?

The price is 57.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Koelner products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Koelner service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12319159/68239321_large.webp