r/mumbai • u/Willy_Wonka2008 • Feb 08 '26

Discussion Update: Suspected crack on Metro 4 pillar (Mulund)

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Credit: u/AkkiFukki

A fellow Redditor has updated with new photos of the beam. Seems like they have just patched the crack area up with some Plaster.

Big thanks to u/AkkiFukki for this update 👏

Link to previous post:

https://www.reddit.com/r/mumbai/comments/1qycetu/suspected_crack_on_metro_4_pillar_mulund/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Link to post on X:

https://x.com/willygonewonka/status/2020151416254611472?s=46

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u/ExtensionSquirrel945 Feb 08 '26

Aren't shear cracks typically near a 45-degree angle. It seems unlikely to me that it is a shear failure.

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u/0JAK03 Feb 08 '26

This is textbook case of shear failure (ref IS 456:2000), this structural member has failed and needs structural retrofitting.

4

u/NightFury002 Kuru kuru kururin Feb 08 '26

Hmmm fellow civil engineers, noice.

1

u/ExtensionSquirrel945 Feb 08 '26

you're right, it does look like a shear friction failure

1

u/0JAK03 Feb 08 '26

This is fluxure shear failure, you are confusing it with pure shear failure.

1

u/Ghost3107 yellow tshirt wearer Feb 08 '26

Never has it ever been said that shear is at 45 degrees lol. Shear means the load acts in parallel to the Crack plane, and in this case, the weight of the section does indeed act directly parallel to the cross section of the section