Build your own carport – embedding post anchors in concrete

Within a few weeks we had prepared the excavation pit for our future double carport. The retaining wall on the slope was also built with formwork blocks and has already been backfilled. The earth now had to sink and the frost from the winter months had to go away first. In the meantime, we were able to take our time ordering the carport.

Requirements for the carport

The carport should be able to accommodate at least 2 vehicles and not have a center post in the driveway. A flat roof should also be a condition because we later wanted to install a photovoltaic system on the carport roof.

Due to our residential location, an increased load-bearing capacity of the snow load was not absolutely necessary, but due to the additional weight for the PV system, it was another selection criterion.

The offer on site was rather manageable. Although the domestic hardware store offered some models. However, none of them met our requirements and expectations.

Alternatively, it would have been possible to make it through the local carpenters and joiners. However, the required structural analysis alone was far too expensive for me.

Configure and order carport online

On the Internet, however, the offer was overwhelming. Due to the uncomplicated and above all immediate quotation as well as the promised possibilities, we decided on a model of the manufacturer “Easycarport”.

The manufacturer sells various standardized kits which can still be adapted on the construction site.

Due to the standardized construction method, the offered carports were very interesting in terms of price. Meanwhile, I can also confirm that the quality of the kit is very good. We opted for a freestanding model of 6 x 6 meters and 4 posts. Side walls and storage room were not selected.

Various packages such as the rain gutter set, the paint package or the snow load reinforcement rounded off our package. The delivery was to be 2 months later at our request. This gave us enough time for further preparations.

H-post anchor concreting itself

However, since the construction drawings and the H-post anchors were sent immediately, I was already able to set the foundation points. The subsoil was already prepared and the excavator was still at my disposal.

Based on the construction drawing, the locations for the posts were described very well. I only had to set the first point and then I could set the other 4 foundation points.

Determine position and angle

The foundation points were marked with tension cords and spirit levels and the holes were dug with the mini-excavator. To determine the right angles, I built a large triangle from roof battens. Thanks to the Lord Pythagoras this was no problem.

I then used a tape measure to measure out the diagonals. Since the measurements matched the specifications in the construction drawing, everything should fit later.

The finishing work was then done with spade and shovel to a depth of a good one meter. The rainy weather made the work on the clay soil at this time very difficult so that the work took longer than planned.

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Empty conduits for electricity, photovoltaics, network and multimedia

From the apartment building I drew a trench to the rear post. Here, the cables for electricity and photovoltaics should later be accommodated by means of empty conduit. I decided to use two 120 KG pipes and two 32 electric empty pipes. So I should still have enough reserves for the future.

I laid the 32 mm empty pipes directly into the KG pipes. This would have been possible afterwards, but this way you save a lot of time.

The KG pipes were well sanded and the trench was then backfilled and compacted with frost protection and crushed stone.

Set H-post anchor – My video

I have recorded all the steps in the following video. In this way, you can better understand the individual steps involved in concreting the post anchors for the carport.

You can find my videos about building the carport in my playlist Project Carport – Building a Carport on a Slope by Yourself. If you want to see more of me and my projects, feel free to check out my YouTube channel.

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Concreting post anchors into KG pipes

To install the 4 H-post anchors, I reverted to my tried-and-true principle of KG tubes. To do this, I first aligned the KG pipes across all four corners and fixed them with concrete.

The H-post anchors were then concreted into the openings of the KG pipes.

To do this, I first marked the post anchors in the appropriate places. This way I didn’t have to re-measure on the job site but could move the markings directly to my tension cords.

The concrete now only had to cure.

Fill the subsoil with geotextile and crushed stone

After that, I applied heavy geo-fleece over the entire surface and applied an approx. 20cm thick frost protection layer in layers and leveled it out. In between, I compacted the surface with my vibratory plate. Now you could already see what would be created here.

After using the carport for over 2 years now, I can say that this approach has absolutely proven itself.