Hi,
every layer of my platform is made of three, not two stripes, otherwise I wold not have been able to carry them in my car. The platform sits on 25mm rubber tiles; my floor is made of normal tiles, and so far I haven't broken anything (althought my DL is puny, and I try never to drop anything from overhead).
IPB
How To Build Your Own Deadlift Platform w/ Your Logo - YouTube
Check out this video from Alan Thrall! Putting horse mat on the sides and then just extending his more rectangular deadlift platform into a bigger platform. The horse mat on the sides is really nice for your weights.