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Rusty rods in Toa Payoh block raise concerns over spalling, building’s structural integrity

Right now, a few blocks in Toa Payoh estate where I live are undergoing electrical-load upgrading by utilities provider SP Group.

The writer is concerned that rusty steel reinforcement rods in his public housing block may lead to spalling concrete after further corrosion.

The writer is concerned that rusty steel reinforcement rods in his public housing block may lead to spalling concrete after further corrosion.

Right now, a few blocks in Toa Payoh estate where I live are undergoing electrical-load upgrading by utilities provider SP Group.

It entails drilling a hole through the ceiling along the corridors for the trunking of electrical cables.

When I took a closer look at the 7cm-by-15cm hole at my block (Block 238 Lorong 1 Toa Payoh), I was perplexed to see rusty steel reinforcement rods.

Having read with consternation the report, “Ceiling concrete slab falls in toilet of old Toa Payoh flat, narrowly misses domestic worker” (Feb 27), I am concerned that the rusty steel reinforcement rods may lead to spalling concrete after further corrosion. Will this affect the structural integrity of the block?

The Housing and Development Board says spalling concrete is a common issue for older buildings and is largely caused by carbonation, a natural deterioration process. This causes the steel bars embedded in the ceiling slab to corrode, which in turn causes the concrete cover to crack and bulge.

I would appreciate it if the authorities or town council could comment on the safety of the block.  

Have views on this issue or a news topic you care about? Send your letter to voices [at] mediacorp.com.sg with your full name, address and phone number. 

Related topics

spalling concrete housing safety HDB town council

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