I had the same issue so I got my biggest drill bit and and drilled it to pieces and shredded to pieces. Dave E
Yes it will work if post is securely attached to spike
The receiver of the spike is 3 & 7/8 inch square and 5 & 1/2 inch deep. There is very little adjustment from this size.
I think it all depends on height of post and the weight Of individual. I would.be skeptical with 2 free standing post holding up a hammock.
I have no experience with that high of winds but do get 20 to 30 and they do just fine
Personally, I wouldn't trust these spikes to hold posts on their own. I always use them in addition to concrete. I dig the hole for the concrete foundation. I attach the E-Z Spike to the bottom of the post. I drive the post and spike into the bottom of the hole with a sledge hammer. Then, I fill the hole with concrete. The spike keeps the post upright while the concrete cures. I have built several fences this way (up to 7' tall). And, it has worked great.
Not only would this violate building codes .. .the reason the codes exist is for safety. If you violate this and the deck fails and there is an injury, your insurance may not cover this (actually it SHOULD NOT COVER THIS) and you could be criminally liable. Medical cost, court costs, yada yada da. Also: (in most any area) you need a building permit before you build a deck (which would not allow this). Once the deck is complete then the deck is signed off (essentially a certificate of occupancy). If you lack that, you can not sell the property.
You could but like all steel and any metal except maybe pure titanium that part of the spike will also rust as will the post fasteners over time. Stainless steel would have to be passivated. How long will it take - depends upon the weather and ground content in your location