# Differentiate between rectangular beam and flange beam

tzx9633

## Homework Statement

How to differentiate between rectangular beam and flange beam ??? In the question below , the answer provided is flange beam , I'm wondering can i design it as rectangular beam

## The Attempt at a Solution

Since there's no clue whether the flange beam or rectangular beam , i think i can also design it as retcnagular beam . Correct me if i am wrong . [/B]

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## Answers and Replies

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anorlunda
Staff Emeritus
As i read it, you need to design it both ways and then compare the two.

tzx9633
As i read it, you need to design it both ways and then compare the two.
ok , thanks for the answer ... how if other question ? Is there any specific clue that we should use flange or rectangular beam ? In what conditions , we should use flange beam ?

anorlunda
Staff Emeritus
Part C of the question says find the "ultimate" design. That is meaningless unless you show a comparison of more than one design.

tzx9633
tzx9633
Part C of the question says find the "ultimate" design. That is meaningless unless you show a comparison of more than one design.
how if other question ( not this question) ? Is there any specific clue that we should use flange or rectangular beam ? In what conditions , we should use flange beam ?

tzx9633
Part C of the question says find the "ultimate" design. That is meaningless unless you show a comparison of more than one design.
Since the question specifies that the beams and slab are cast together, can i say that the beam must be 100% flange beam ? IMO , the rectangular beam doesnt have beams and slab are cast together, am i right ?

anorlunda
Staff Emeritus
You're beyond my expertise. I'll let someone else answer.

Nidum
Gold Member
There just is not enough definite information given in the problem statement .

So it's down to @tzx9633's judgement - if designing this floor slab for real what would he use ? What is commonly used in such situations ?

That's how things work in engineering . There is seldom enough definite information provided at the start of a new project .

tzx9633
tzx9633
There just is not enough definite information given in the problem statement .

So it's down to @tzx9633's judgement - if designing this floor slab for real what would he use ? What is commonly used in such situations ?

That's how things work in engineering . There is seldom enough definite information provided at the start of a new project .
This is just a coursework question , it's just an question from the exercise ...Since the question specifies that the beams and slab are cast together, can i say that the beam must be 100% flange beam ??

tzx9633
There just is not enough definite information given in the problem statement .

So it's down to @tzx9633's judgement - if designing this floor slab for real what would he use ? What is commonly used in such situations ?

That's how things work in engineering . There is seldom enough definite information provided at the start of a new project .
afaik , rectangular beam doesnt have beams and slab are cast together

Nidum