Do metal blocks weigh less than bars?

[rat]

I've got a 25 z-level pit, and I'm trying to make sure the floor is the heaviest thing I can get my hands on. I heard that iron was pretty dense, so I went ahead and paved the floor with iron blocks.

The wiki is a little confusing, it says that making blocks out of items reduces their weight, except in the case of metal blocks. Do I need to replace the floor? (Preferably things explode on impact, I'm dealing with zombie invasions here.)

[Player 1]

... I am a "NewBe" so i'm not sure but why you dont make it Magma save and Flood it Time by Time... Or leave just a little Magma lake inside... Can Zombies Swimm in Magma?

[The Trashman]

Originally posted by Player 1:

Can Zombies Swimm in Magma?

Not for long >:)

[Sinclair]

Blocks are lighter than stone boulders. Not sure about bars of metal, you need to check how many bars go into a block.

Lead, silver, gold and platinum are all heavier than iron actually.

[Other]

Floor impact damage depends on the density, rather than the weight, so blocks vs bars of the same substance should perform the same in zombie-splash tests. The densest commonly available material is platinum (as blocks, bars, or ore).

[Moonlightfox]

Density is a property of the material; an iron floor is an iron floor whether it's made of blocks or bars.