Lintel Design for Beginner Engineers
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- In this video I demonstrate a simple lintel design example as a practicing engineer.
Lintel design is very basic but still just as important to know as any other design. Whilst you won't need to use it too often in new build projects, in refurbishment projects you will often come across plenty of areas where lintels (especially concrete lintels) are used.
Link to Catnic Lintel load table: catnic.com/pro...
#catniclintels #structuralengineering #precastconcretelintels
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hey everyone, I missed out multiplying the masonry wall loads by 0.1m or 100mm. So the wall loads that i calculated are a factor or 10 out! This goes to show that you shouldn't work late at night and you should double check the numbers! The steps and process remains the same though!
Hi,
What parts of the calcs are these added into? Thanks
It’s when I’m calculating the self weight of the walls. I forgot to multiply by the wall thickness
@@EverydayDazz So its on the brick and block loads for the load triangle? thanks
Yeah that’s right
@@EverydayDazz Thanks, is a final answer of 5.065KN correct? cheers
I think you need to add the self weight of the wall between first and roof as well as the line loading from the roof. Then consider this as the UDL coming down. Unless there are openings in the first floor affecting how the load is spread.
1.80m is usually pushing the limit for a lintel supporting a load bearing wall.
Need to check the inner : outer load ratios which is commonly missed out and can affect the size of the lintel used. Probably won't affect it in this scenario that you have used. Great videos 🙂 Can you do one on timber framed buildings and racking.
Thanks Dazz this was really helpful!!
where does the 4/2 come from and what does that get applied to?
I think your units are wrong when calculating the interaction zone dead and live loads?
Really helpful video, thank you. What happens when a window opening cuts through the loaded triangle? I have a 3.2m garage opening with a window centrally above it about 1.1m - so well within the 1.6m high loaded triangle. The corners of the window opening will be 100mm inside the edge of the loaded triangle. Many thanks.
Hi. I’m just wondering where are the loads for first floor walls and also roof transferred to? Great video btw, helps people like me who are new in the industry.
The first floor wall is transferred by the lintel and the load is supported on the ground floor walls either side of the opening. Depending on which way the roof spans, the roof will be supported off the first floor walls as well.
The window span is 4.85m and height is 2.8m and the wall thickness is 150mm; please suggest a lintle size.thank you.
Your videos are very informative. However, you are very fast and your writing is not very untidy. Otherwise, good and keep up the good work.
Hi Thx for video. very clear and informative. Just one quick question re point loads. If I have a wooden beam? (timber that spans between gable ends for ceiling joists to be fixed to) in the wall above the lintel and in load triangle shouldn’t 100% of that load (dispersed at 45deg) be applied?
I’m sure I read that on some website, but you say ONLY the weight of supported masonry.
Also, if the wooden beam is just outside the interaction zone does that have no influence on the loading?
E.g. If I were to draw a triangle below the point load it would be covering part of lintel.
I’m not a builder or engineer so excuse any incorrect terminology.
Really helpful!
Shouldn't the bottom of the load triangle be wider than the clear span? [clear span x 1.1]
Your are correct, this is know as the effective span.
Hi there, I have a question. When designing the lintel for a ground floor window for brick house. Do you need to consider the brick veneer load on the wood lintel as well ?
Hi mate, If there are openings in the zone above the lintel, how are the loads adjusted. Thanks
How would you do a deflection check on a lintel if it was a large span (4.2m long, catnic CXL type)? Thanks
Hi there nice work :) but I have a question. What is the reason why 'interaction zone' degree is 60? where is come from? thanks
Because that’s what the eurocode and British standard code says 🙂
@@EverydayDazz thanks :)
Shouldn't you also add the masonry loads of the loft above the first floor?
only the masonry within the loaded triangle needs to be considered because of the way masonry arches.
@@EverydayDazz So what about loads above? How is it transferred to the ground?
the loads above would spread to the rest of the wall supporting the lintel.
@@EverydayDazz ur calcs not correct. Total equivalent UDL at SLS should be 3.3kN/m
@@annesmith2273 How did you get to 3.3KN/M? Thanks
May I know in Which software you use to annote or write in laptop? If you please tell me, it would be helpful for me
Concepts for iPad
0.81 m^2*22 kN/m^3=17.82 kN(!)
Someone forgot about the thickness of the wall.
Please check your UNITS!!
The video is informative, but errors and ommisions make this a very difficult watch. Maybe reconsider remaking it as there really nothing much otherwise out there, so it could be great
Do you design lintels for wind loads? being timber, block, brick or any material
I don’t think I’ve ever designed the lintel for a wind load but you would need to check the masonry panels for wind load.
@@EverydayDazz But aren't the masonry panels connected to the lintel? I've had this discussion with colleagues before. Some think lintels should be designed as wind beams, while others don't.
I would maybe check the lintel for wind if the opening was very large and if there wasn’t a significant amount of masonry above the lintel. It really isn’t something I’ve ever considered as much of a problem.
Can you do this with a log lintel?
Can’t see why not but it needs to be supporting masonry.
The only reason you can load the lintel like that is because the masonry can arch.