Thanks all, they can't do additional purlins between as the grid system between the top and bottom sheet does not positively connect to the new purlins.
Will tek screws be sufficient? I think bolting may be more suitable.
Hi All,
I am investigating a solution to strengthen some existing roof purlins for an existing portal frame roof.
There is an adjacent building being built right next to this one, so additional snow will be created due to it effectively being a parapet right next to it.
The existing...
Thanks George,
I will look at running it and oversailing it so it acts as a propped cantilever.
I think this is the best way forward for this scenario.
Kind regards,
Liam
Hi George,
Very good points, the brickworkdevelopment association recommends a slip plane to parapets, but this seems to be too onerous.
The width of parapet is 18m to the returns, therefore, will definitely need at least one movement joint with windposts either side of the MJ.
Will have...
Hi XR250, yes 1100mm high masonry cavity parapet.
What do you mean reinforced masonry? - Bedjoint reinforcement? - There are movement joints at typical 6-8m centres to both leave.
Hi All,
I was wondering if anyone has any experience with parapet posts that are contained within the cavity wall of a wall where the roof is timber joist or timber posi-joists.
I am struggling to justify the base moment and push-pull forces generated owing to the parapet wind post being...
Hi George,
Thanks very much for your response.
Noted on the nails.
Yes, water tank will be removed and everything fed in from ground.
Concern is a 6m span purlin which sags. I think I am going to propose PFC strengthening beams with steel EA corbel either end to take a bit of deflection...
I don't know the wood type.
New roof will be heavier as new insulation and insulated plasterboard on ceiling joists below. (Current collar tie).
If numbers don't work then will need to double up rafters or strengthen purlin.
Afternoon All,
I am assessing an existing property to determine if the roof is suitable for retiling and new sheathing etc.
The property was constructed circa 1860 (In Kent, UK), solid wall construction with a timber cut roof supported on purlins and wall plate.
The purlins are 145 x 75mm...
Good Afternoon,
I am hoping if anyone has any useful advice and tips on ground floor rear wall removal on a sloped site. From the pictures and sketches in the attachments, the site is sloped significantly. Therefore, toward the rear of the property, the brickwork below internal ground level is...
Hi drift,
Thanks for the detailed explanation.
The bottom beam of the box frame is typically 'encased' in concrete due to being below ground and will then bear against the existing foundation.
As per my OP, do you have any reference to an actual design exemplar?
Liam
Hi All,
Does anyone have any literature or design examples on steel moment box frames to allow for large openings in rear walls (typically). I am struggling to find any examples or design guidance online or in any steel design books.
In addition, can anyone explain in Simple terms when they...
Hi BigH, isn't frost protection more for the start of the top of the foundation? - In the UK it is general 450mm below to the top/start of the trench. My query was more in relation to the depth of the underside of foundation and the depth of the actual concrete trench itself.
Hi George,
Thank you for the response. That has definitely cleared up a lot of thoughts I had. Especially clarification it is from existing ground level presuming green field conditions.
Agree, if made ground / previous industrial nature. Will change this.
Thanks again,
Liam
Good Evening all,
I am a relatively new engineer and would like some clarification and guidance on a query I have in relation to NHBC guidance for trench foundation in cohesive clay soils.
Upon review of documentation and also discussing with other engineers. The terms 'minimum 1.0m deep...
