• 100% Satisfaction Guarantee

StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 5057
Experience:  Structural Engineer
59685895
Type Your Structural Engineering Question Here...
StructuralEng is online now

# I need to calculate the load-bearing capacity of a steel I-Beam

### Customer Question

I need to calculate the load-bearing capacity of a steel I-Beam 6"x6"x1/4", 13'-6" long supported by 9" masonry on each side
Submitted: 2 years ago.
Category: Structural Engineering
Expert:  StructuralEng replied 2 years ago.

StructuralEng : Hi
StructuralEng : I can help with this
Customer:

Thanks

StructuralEng : What grade of steel?
Customer:

Customer:

I know it varies with the grade of steel. This is not a load-bearing beam, just a garage door opening in a masonry wall. What do you suggest?

Customer:

Zoning wants to know.

StructuralEng : Te only load on it will be CMU in the wall? The wall is not load bearing?
Customer:

No load. The roof trusses are 13'-6" apart. This is a one story structure.

Customer:

Putting in a 12' door.

StructuralEng : No load other than the CMU, right?
Customer:

What is CMU?

StructuralEng : What is the height of the CMU above the opening? What is the thickness of the CMU?
StructuralEng : Concrete masonry unit
Customer:

Less that 1'. Maybe 10".

StructuralEng : Really? An you're getting questioned about a beam size? Give me a few minutes to run some numbers
Customer:

PIA zoning guy.

StructuralEng :

You can use a W5x16 or a W6x12. The first number is XXXXX depth in inches and the second number is XXXXX weight of the beam in pounds per foot. Depending on the thickness of the masonry, you might need something bigger just to provide a wide enough bearing surface for the masonry.

StructuralEng :

How thick is the masonry.

StructuralEng :

If you've found my answer helpful, please click the green "accept" button. I'll be happy to answer additional questions on the topic. If you could provide feedback, I would appreciate it.

Customer:

The masonry is about 8" thick I think. Not sure, but I'll stay with that. What kind of load-bearing capacity does that W6x12?

StructuralEng :

The W6x12 can take much more from a strength standpoint. Deflection is controlling the design. ACI 530 requires beams that support unreinforced masonry to be designed for a deflection limit of L/600, which in your case is 1/4"

StructuralEng :

It's only at approximately 50% of the beam capacity from a strength standpoint.

StructuralEng :

The last comment I would have is to make sure the bearing condition is detailed properly to ensure overall stability.

Customer:

Nice and flat, I take it. Do I bolt it down?

StructuralEng :

You can also use a steel tube 7x4x3/8 laid flat. This will give you a nice 7" flat surface to bear the masonry on.

Customer:

Box tube, right?

StructuralEng :

The bearing detail will depend somewhat on what is supporting it, but you'll want it bolted at both ends, but one end needs to be able to move (for thermal expansion and contraction) so you'll want that properly detailed. Also, you'll want full depth stiffeners. And you need to make sure that the masonry is grouted properly at the bearing locations.

Customer:

Thank you for your help. Slot those holes.

StructuralEng :

Correct, the HSS is a steel tube 7" x 4" with a 3/8" thick wall.

Customer:

Thanks again.

StructuralEng, Consultant
Satisfied Customers: 5057
Experience: Structural Engineer
Expert:  StructuralEng replied 2 years ago.
No problem. Best of luck with your project.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

### What Customers are Saying:

• Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
• Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
• This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
• Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
• I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
• Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
• Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
• He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

• ### walkereng

#### Satisfied Customers:

1646
Over 29 years of Structural Engineering experience.
< Last | Next >

### walkereng

#### Satisfied Customers:

1646
Over 29 years of Structural Engineering experience.

### vgdlpc

#### Satisfied Customers:

17
Civil Engineer, Major in Structures and Foundations. Professional Engineer 11 years of experience.

### StructuralEng

#### Satisfied Customers:

3841
Structural Engineer

### Matt

#### Satisfied Customers:

19
Mechanical Engineering Hons degree, been working in automotive industry for the last 18 years - Engine development engineer
• /img/opt/shirt.png ibosley's Avatar

### ibosley

#### Satisfied Customers:

88
Mechanical Engineering

### FiveStarLaw

#### Satisfied Customers:

109
attorney and legal researcher

## Related Structural Engineering Questions

Chat Now With A Structural Engineer
StructuralEng
Structural Engineer
3855 Satisfied Customers
Structural Engineer