Could a 1.5 MPa moment be enough to crack a concrete beam??

Is this a prestressed beam?

After loading you have a net 1.5 MPa tensile stress at the bottom fiber (since you are using her Majesty's Royal Units, you will probably like to see "fibre")?

1.5 MPa = 0.22 ksi

Ft = 5 * sqrt(f'c) = 5*sqrt(4000) = 0.32 ksi
So you might be okay

So your beam will crack

Anonymous 2017-03-30 02:11:18 Post No.1153224
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Anonymous 2017-03-30 02:11:18 Post No.1153224 [Report]

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11KB, 378x153px

You can actually use 7.5 instead of 5.0.

the term in the radical has units of psi

Anonymous 2017-03-30 02:19:54 Post No.1153229
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>>1153220
>Is this a prestressed beam?
Not sure. How much difference would that make?

>her majesty's royal units
Lol (Actually laughed at that). I literally have to learn the absurd Imperial system of units and go through the most ridiculous conversions just because Americans won't let go of their retarded measurement system where we compare things to human feet and yard sizes instead of a simple standard metre.

Why? Who in their right mind would oppose the metric system? Every time I have to convert metres to feet and "inches" I die a little bit inside

>so beam could crack
Ok thanks

Anonymous 2017-03-30 05:04:15 Post No.1153276
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Anonymous 2017-03-30 05:04:15 Post No.1153276 [Report]

>>1153229
>Stones

Anonymous 2017-03-30 05:06:18 Post No.1153277
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Anonymous 2017-03-30 05:06:18 Post No.1153277 [Report]

>>1153229
Didn't Liberia or Burma convert to metric some years ago?

Anonymous 2017-03-30 09:30:03 Post No.1153389
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Anonymous 2017-03-30 09:30:03 Post No.1153389 [Report]

>>1153277
Just looked it up and that's correct. Burma adopted SI Units in 2013.

It's now just the US of A and Liberia

Anonymous 2017-03-30 10:14:46 Post No.1153418
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Anonymous 2017-03-30 10:14:46 Post No.1153418 [Report]

>>1153229
>Who in their right mind would oppose the metric system?

Nobody actively opposes it, it's just it would cost effort and money in the short term to do so. Given that the US is somehow pretty damn bad at making short-term sacrifice for long-term gain, you can see the problem.

t. guy who thinks it's retarded that I have to buy two sets of wrenches and sockets.

Anonymous 2017-03-31 03:35:31 Post No.1153540
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Anonymous 2017-03-31 03:35:31 Post No.1153540 [Report]

>>1153389
Not yet using the God-tier FFF system.

https://en.wikipedia.org/wiki/FFF_system

Anonymous 2017-03-31 05:36:41 Post No.1153582
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Anonymous 2017-03-31 05:36:41 Post No.1153582 [Report]

>>1153540
>FFF System
>A microfortnight is equal to 1.2096 seconds

Top fucking kek. I can't stop laughing

Anonymous 2017-03-31 07:54:05 Post No.1153826
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Anonymous 2017-03-31 07:54:05 Post No.1153826 [Report]

I'm a concrete man.

Just sledge it.

Anonymous 2017-04-01 12:02:03 Post No.1153962
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Anonymous 2017-04-01 12:02:03 Post No.1153962 [Report]

>>1153826

Anonymous 2017-04-01 12:04:50 Post No.1153964
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Anonymous 2017-04-01 12:04:50 Post No.1153964 [Report]

>>1153962

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible. Read more on this topic here - https://archived.moe/talk/thread/1694/

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/