EcoRenovator - View Single Post - My "10 year project": rebuilding an efficient "tiny" crooked house in Canada

jvanland · 03-09-12, 08:54 PM

So, when you are ready to check the slab, here is a simple technique used by structural engineers I know to evaluate parking structure decks for delamination. Get a six foot or so length of heavy chain - think logging chain not swing set chain. Drag the chain in a regular pattern over the surface. Where the slab is solid, the chain will "clink" along with a high-pitched sound. (It helps if the slab has a rough surface. If it is smooth, pick up the chain and drop it along its length.) Where the slab has voids below or delaminations, the sound will abruptly drop in pitch. Work with it for a few minutes and you will hear the difference.

I like the two stories about using shoring (word of the day?) to remove and replace walls. Great technique.

03-09-12, 08:54 PM	#28
jvanland Lurking Renovator Join Date: Sep 2009 Location: St. Louis, Missouri Posts: 2 Thanks: 0 Thanked 1 Time in 1 Post	So, when you are ready to check the slab, here is a simple technique used by structural engineers I know to evaluate parking structure decks for delamination. Get a six foot or so length of heavy chain - think logging chain not swing set chain. Drag the chain in a regular pattern over the surface. Where the slab is solid, the chain will "clink" along with a high-pitched sound. (It helps if the slab has a rough surface. If it is smooth, pick up the chain and drop it along its length.) Where the slab has voids below or delaminations, the sound will abruptly drop in pitch. Work with it for a few minutes and you will hear the difference. I like the two stories about using shoring (word of the day?) to remove and replace walls. Great technique.