5 ms·
Interesting idea. Something that made me pause was to see that each edge was attached via a single screw. People who know more about construction than me (major
by Communitivity 4y ago
Interesting idea. Something that made me pause was to see that each edge was attached via a single screw. People who know more about construction than me (majority of the world), isn't this a problem if you want a sturdy design?
- traverseda 4y agoUsing a single screw turns that screw into a pivot point. For geodesic domes though the wood being able to pivot is not really a problem.
- jonathankoren 4y agoMaybe not for the skeleton, but it’s certainly a problem for the outer shell
- btbuildem 4y agoEspecially given that the screw is going into end-grain. That is a very weak joint, you could pull the screw out with pliers.
- JKCalhoun 4y agoI don't know. Going into end grain I would want something with deep threads like a lag bolt. Given enough length (threads) it could be pretty solid.
- deleted 4y ago[deleted]
- foobarian 4y agoIt doesn't look like there are any pull forces in a dome so I wouldn't be concerned. Mainly there seems to be shear forces which could be a problem if the wood splits.
- deleted 4y ago[deleted]
- RobotToaster 4y agoAlso you're never really supposed to screw into end grain, it has half the strength of a normal screw joint.
- a9h74j 4y agoHalf-full or half-empty in this case? For end-grain I find estimates of 75% stength on average expecting considerable variation joint-to-joint, assuming proper pilot holes have been drilled. If the hold scales with the diameter of the screw, then a larger screw might compensate. The square of the wood's specific gravity might dominate differences: https://www.engineeringtoolbox.com/wood-screws-allowable-withdrawal-load-d_1815.html https://www.engineeringtoolbox.com/wood-screws-allowable-wit... Also, what is the pull-resistance on the snap joints themselves?