Any Architects on here?

[ETC]

[Gus Potter]

@ETC good detail.

 

The vertical strut at the joist end seems to be missing from @Mulberry View?

 

This omission of this dramatically changes the forces in the metal web for example.

 

Best just to seek clarification.

 

 

[Gone West]

8 hours ago, Gus Potter said:

The vertical strut at the joist end seems to be missing

We had our metal web joists installed as per @ETC drawings. A few of the joists had to be shortened, and the builders contacted the joist manufacturers, who said they could be shortened, but that the end vertical strut had to be fitted as per original, after shortening.

[Mulberry View]

21 hours ago, Gus Potter said:

 

I was bit more diplomatic as I used the word "improvised" @Dave Jones was maybe a bit more forthwrite.

 

@Mulberry View I don't doubt you have done your best and am sure you have not cut corners. However I can tell you as I do this as a day job.. each of the designers may have done a great job.. and you installing it as per the drawings etc. But one of the things I do is to coordinated designs SE wise.. to pick up on the little but important bits that get missed. I often see things like this so don't feel bad.

 

It looks to me that the top flange of your joist is carrying all the shear load on a small bearing area. Think about it.. you have all that floor load and a bit of tying all ending up on the top flange of the joist.. it just looks questionable to me. When I see something like that I always ask.. is this ok? I'm happy to be proved wrong.. I just suck it up.. but if I'm right.. which I am from time to time then it saves a lot of folks bacon. It cost nothing to ask the question, the only cost can be your pride.

 

Please get your design team to review this as if I'm right this is a tiny but major flaw and needs sorted for safety.

 

 

 

 

 

It's one thing making recommendations, but you went in fairly heavy-handed and caused me sleepless nights without having the full picture.

 

This image that I posted on Page 3...

 

 

Is directly from Pasquill's design, which has been agreed with my engineer. The whole of the first floor is in the same principle. Are Pasquill's design engineers not capable of engineering this? But just to be sure, my SE spec'd 195x47 for the Ledgers for the first-floor joists after examining the scheme before it was signed off. The same principle was used for the roof ledgers, so they are probably overkill.

 

If I deviate from their designed scheme, will they underwrite it? If you were the engineer here, would you underwrite it if it hadn't been installed as designed? I think you know the answer to that, so for that reason, I have installed it to the absolute letter. So what could I have done differently? Questioned Pasquill? Questioned my SE? I am a ruthless worrier, so I have done both and both times the same verdict was returned.

 

Fun Fact - My First Floor has been engineered using predominantly top-chord hung Posis and cleared for the 750kg loading needed for a large bath upstairs, along with a 2.3m high 2.6m wide 3-sided triple-glazed Oriel Window. I can't imagine what that will weigh.

 

 

[Mulberry View]

11 hours ago, Gone West said:

We had our metal web joists installed as per @ETC drawings. A few of the joists had to be shortened, and the builders contacted the joist manufacturers, who said they could be shortened, but that the end vertical strut had to be fitted as per original, after shortening.

 

Conversely, my own surveyed measurements were so tight, nothing in my first floor scheme had to be adjusted. Everything dropped straight in.

 

The roof scheme is largely the same, but my 'squint' cuts had to be made on site by me to ensure sufficient bearing. All cuts were made from the verified trimmable portions of the joists.

 

I just don't know what else I could have done!

[Mulberry View]

20 hours ago, Gus Potter said:

@ETC good detail.

 

The vertical strut at the joist end seems to be missing from @Mulberry View?

 

This omission of this dramatically changes the forces in the metal web for example.

 

Best just to seek clarification.

 

 

 

Again, Pasquill didn't design it this way, so what ought I have done? Added it? The scheme was designed on Mitek software by the way. I have full 3D's of them if you want a look!

[Dave Jones]

another vote for the lindab galv guttering. Found the 125mm cheaper to buy than the 100mm. The hoppers were 8 weeks leadtime from factory when i ordered in feb. may have changed..

 

 

 

 

Edited Thursday at 06:56 by Dave Jones