Daisy Chaining Hinges Makes First Hinge REALLY Weak.
If you add a second (or more) hinge to the first hinge then the first hinge has almost no torque.
In my test I had one hinge connected to a grid at a 90 degree angle so as I added blocks they would be horizontal to the ground.
If only ONE hinge is used then I was able to add up to 30 blast door armor blocks and it lifted it up no problem.
If I had the same hinge and then add a second hinge I could only add up to four blast door armor blocks before the first hinge will fail and drop. The second hinge seemed to be unaffected.
So either a single hinge weighs as much as (or has the same mass as) 26 blast door blocks OR,...
Hinges are broken.