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    DIY RSJ installation


    How risky is it to install an RSJ DIY? Is it okay to do so? Do you need special permission or approval? How does it work? Thanks.

    Asked by Adam on 18th Feb 2021
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    wilson design and build

    "installing and RSJ is defiantly not something I would recommend to someone with no experience! if not done properly it can cause structural cracking and movement or even collapse which would result in serious harm or even death.
    The size of the steel needs to be calculated by a qualified structural engineer then the steel needs to be installed by an experienced installer ensuring everything is propped and pack sufficiently"

    Answered on 23rd Feb 2021 - Member since Feb 2021 - report
    Stoneridge Property Services Ltd

    "Hi Adam,

    When it comes to RSJ installation I would leave this up to a professional. The weight of the floor above relies solely on this beam and stability of the walls it rests on so it is a very important structure. To install one will need the assistance of both a structural engineer to calculate the beam size & a building control officer to sign off the installation as safe. Hope this helps.


    Answered on 19th Feb 2021 - Member since Oct 2020 - report
    Traditional Roofing & Building

    "Hi you will need to contact building control about the size off the opening to wot size your r.s.j needs to be in Wight hight n thickness off the r.s.j calculated by a professional drawer .. n as you will be in most cases you will be dealing with iether a double main wall it wood be easier to install 2 small r.s.j.s if it is double brick it will be main load bearing wall so you will need props and scaffolding boards supporting both sides off the roof n then strong boys on acrow props drilled in to the brick work to hold up any brickes belowe ceiling hight so thay don't drop out or fall n cause any damages to you or flooring or the hole house falling on you safety first in any project you are looking to performe in your own property .. then remove n chisal brickes a way to the size off the opening you require you will all so need slate and stone type pillers to sit the r.s.j.s on something like a curb stone something that is cast stone with steal running through it preferably .. n slate to fill any small gaps once you have installed the them put a spirit level on them to set then right then use slate to pack in between r.s.j n brick work or wooden joists to fill gapes property then sand n cementing the holes up so thay don't vidrate out for it to collapse on you .. n fit brickes back to any fair size holes as well n leave props in for 48 hours not to forget to mix your sand n cement 50 to 50 so it is like concrete when sets then you can start your plastering after it is all set n dry n make good with skirting boards exsetra ..."

    Answered on 27th Feb 2021 - Member since May 2020 - report
    S&s buiding services

    "Don’t do it without permission or a structural engineers report especially a load bearing wall"

    Answered on 20th Feb 2021 - Member since Feb 2021 - report
    Elite construction UK limited

    "You don't need permission for this. The is risk depend where do
    Want do it."

    Answered on 18th Feb 2021 - Member since Sep 2020 - report
    benfleet brickwork and construction

    "if the wall is loadbearing where you want to place the rsj,you normally get a structural engineer to work out the weight load going on to the steel,then they will work out the exact steel you need and supply you with calculations and the steel you need,you would also normally need padstones either side of the steel with a 150mm bearing either side,normally 3 courses of engineering bricks or a solid concrete padstone.I wouldnt suggest doing one with zero building experience as it can be dangerous if you dont know what your doing."

    Answered on 18th Feb 2021 - Member since Apr 2019 - report
    Kings of Hampshire

    "if you know what you are doing a low risk operation , bit like flying an aeroplane but the consequences of getting it wrong are deadly and /or expensive"

    Answered on 18th Feb 2021 - Member since Oct 2020 - report
    Howard Builders

    "it is very risky, however
    it is okay to fit it yourself however you will acrows and possibly strong-boys and strong planks.
    you will need building regs or a building notice permission.
    you will need a structural engineer to calculate the corect universal beam"

    Answered on 18th Feb 2021 - Member since Jun 2020 - report

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