# Koelner D-TU-91 Bolt-Down Post Support 91 mm

**URL:** https://aio.lv/en/product--koelner-d-tu-91--12283477
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Fencing & Barriers
**Manufacturer:** Koelner
**Manufacturer code:** D-TU-91
**EAN:** 5906675431420
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 47.10 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-d-tu-91--12283477

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Koelner D-TU-91 is a bolt-down post support designed for stable and secure mounting of wooden posts to concrete surfaces. With a 91 mm diameter, this steel support provides structural integrity for fences, pergolas, and garden constructions. It features a durable finish for corrosion resistance, ensuring long-lasting performance in outdoor environments. Ideal for professional construction and DIY projects requiring reliable post anchoring.

## Long description

The Koelner D-TU-91 bolt-down post support is a high-quality structural component engineered for the secure installation of wooden posts onto concrete foundations. Designed with a 91 mm diameter, this support provides a stable base for various timber structures, ensuring that posts remain upright and firmly anchored. The robust steel construction is treated with a specialized finish to offer enhanced resistance against corrosion and environmental wear, making it a reliable choice for long-term outdoor use.
Advantages
This post support offers exceptional structural stability by creating a rigid connection between the wooden post and the concrete surface. Its design minimizes direct contact between the wood and the ground, which helps prevent moisture absorption and subsequent rot, thereby extending the lifespan of the timber. The installation process is straightforward, allowing for efficient mounting without the need for deep excavation or complex foundation work. Furthermore, the durable steel material ensures that the support can withstand significant mechanical loads and varying weather conditions over time.
Suitable for
Fencing and perimeter enclosures
Pergolas and garden gazebos
Timber carports and sheds
Decorative garden structures
This product is not suitable for mounting posts into soft soil, sand, or loose gravel, as it requires a solid concrete base for proper anchoring. It is also not intended for use in high-load structural applications where specific engineering certifications for heavy-duty load-bearing steel columns are required.
Key specifications
Diameter: 91 mm
Material: Durable steel
Application: Bolt-down mounting to concrete
Finish: Corrosion-resistant coating
To use the Koelner D-TU-91, first ensure the concrete surface is level and clean. Position the support in the desired location and mark the anchor holes. Drill the holes into the concrete according to the requirements of your chosen anchor bolts. Secure the support firmly to the concrete using appropriate heavy-duty expansion bolts or chemical anchors. Once the base is securely fixed, insert the wooden post into the support and fasten it using suitable wood screws or bolts through the pre-drilled holes in the side plates.
What to consider before purchase
Verify that the post diameter matches the 91 mm support size
Ensure the concrete base is fully cured and structurally sound
Check that you have the correct type of concrete anchors for your specific surface
For optimal performance and safety, regularly inspect the connections for any signs of loosening or corrosion, especially after extreme weather events. Ensure that the wood is treated for outdoor use to complement the durability of the steel support.

## FAQ

### How much does the Koelner D-TU-91 Bolt-Down Post Support 91 mm cost, and is it available for purchase?

The price is 56.99 € (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 06.07.2026 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/12283477/68204722_large.webp