Getting into some warmer days now. Hit 80 yesterday. The ridge vent is killing it. Greenhouse temps are pretty close to ambient temps in direct sunlight with no fans. There were concerns that the fine screen in the vent window would slow the airflow and cause warm air to collect somewhat, but the airflow is excellent.
Rivnut puller arrived today. Several places to use these. Starting off with eyebolts to fasten netting for flower season, Light hangars, and for door locks. The one in the pic is 1/4-20 but this can pull 3/8" and 7/16" threaded rivnuts. Using bolts with rivnuts instead of purlin clamps could save $$ in construction. You just need a drill guide to keep the holes straight.
I have never seen rivnuts before. Are they strong? I use bolts instead of perlin clamps if i am trying to save money. I use a few perlin clamps to line everything up and then i bolt it and take off the clamps.
There are a bunch of ways to get holes straight in tubes. The cheapest are these little jigs that u slap on pipe that hold the bit straight. Also using a tap is helpful.
U can get magnetic drills that are like little portable drill presses that u can use upside down and they just suck to the pipe. They are expensive though and not really worth getting unless u are building greenhouses all the time.
One of the basic fork shape drill guides would work perfectly. Just so it's straight and the holes line up. As long as the hole for the rivet is the right size I think these are pretty strong. 37 bucks for the puller. Rivnuts are about 10 cents.
Im just putting in a bunch of eye bolts and don't want to drill all the way through the tubes.
They look pretty cool. I think I'm going to get one. I like them eye bolts. I don't fully understand how they work. I need to get one to play with. I usually just use course thread eye bolts if i don't want to drill all the way through.
The nut screws over the stud 1/4-20 and that goes through a pilot/guide hole. The lever squishes the knurled part of the nut without any threads into a donut or washer shape then the installation bolt/tool is unscrewed. Looks cool. Isn't necessary to access the other side for installing a lock nut, it won't loosen over time no welding or holding the nut while tightening the bolt.