24 x 60
Excellent design, quality, support, and organization. More details below: Size/design: We purchased a 24x60 with 4 foot sidewalls from TVH with help from a NRCS grant to grow year-round veggies on a small market farm. The TVH 24 ft wide gothic design is unique, with much of the shape and size of 30 ft wide tunnel but without seeming too big for a suburban farm. At 24 feet wide its proportions still bring alot of functionality for the professional grower. For example, the standard 4 foot sidewalls are taller than you'd think, and eliminate any issues with shoulders hitting the sides on the outermost rows since the bows add height to the sidewall. Trusses are still well overhead giving plenty of space for trellising and airflow. If you are using the popular 30 inch bed system with modest pathways, the 24 ft. wide tunnel fits 6 beds, with trusses spanning the center 4 beds for full-height trellising. I could see some benefits from 6 foot tall sidewalls if we wanted to do full-height trellising of tomatoes or cucumbers on the outermost beds, but we can still trellis from the outermost purlins since TVH's 24 ft tunnel is designed with 5 purlins, instead of 3 purlins like some other high tunnel kit manufacturers. Cost: Pricing was very reasonable and close to NRCS $/sqft rates. The bows, channel, ground posts, purlins, etc are all extra sturdy for this size range. Install/Support: Videos from the TVH YouTube channel pair with each step of the written instructions, and phone support is very reliable. My impression is there is not a lot of content detailing high tunnel construction but TVH is making this knowledge more publicly accessible via YouTube. This helped us feel more confident with our build and know what questions to ask as TVH customized the kit for our farm and budget. Our only issue was minor, and quickly fixed, one bag of the wrong baseboard hardware. High tunnel companies like TVH are creating key infrastructure needed to get us closer to that vision of more small farms and local food. Great job TVH. Few install tips: * We opted to use carriage bolts instead of tek screws to secure the bows to the ground posts. A step bit and corded drill helped a lot during this step. * If you are thinking of eventually adding a second layer inflated top cover, order some extra cross connectors with your kit so you can install the peak purlin below the bows instead of on top of the bows with upward facing two hole straps. This made the install easier and eliminated our need for a jumper tube when we later upgraded to a double layer top cover. * Consider a gas-powered post pounder day rental for the ground posts step to avoid potential stress injuries or accidents from lots of sledge hammering
