Hi all, as you can likely see I am newbie on here. I am a very confident DIY’er, having previously spent several years on the tools.
I am currently in the early stages of a garage/workshop build. I have (in my mind) the design I want. In simple terms the block work footprint will be roughly 7.7x6.7, overall height just under 4m. Having discussed this with my bricky he is suggesting a cavity wall (75mm) with some kind of medium to light density block. He also said this would negate the need for any internal piers given the long runs on block work.
The roof will be a simply dual pitch and will run left to right on 7.7m elevation. Having checked all local council planning documents it would appear this is possible with just regs.
I have designed and built previously at home myself, and did so with a large timber building within another part of property. I am keen to do the same with this, if I can. I have a very good friend who is a superb bricky and he is lined up for all ground works and block work. I will undertake all roof timber myself. I am still not sure on the final finish on the roof. (Either slate or metal panels)
I am keen to keep it with 4m overall height for a few reasons, one being retaining my own views from upstairs widows. But, I also however want to maximise all space within the structure by having a vaulted roof. I am confident spanning an RSJ from gable to gable would achieve this, along with the ability to use a block and tackle to maybe lift engines from cars etc. (Max load 500kgs). My initial thoughts either birds-mouthing the 6x2 rafters in to both the wall plate and RSJ. The ridge beam sitting the RSJ. I figured I’d need to make some OSB gussets to reinforce the join between both side, would doing this being enough to negate the structural integrity that roof joists offer?
My intention on the roof thereafter would be rafter spacing at 24” and clad competely with 18mm osb. Initially this will just be covered in normal shed felt - I haven’t yet decided if I want slate to match the house or black corrugated sheets.
Can anyone suggest what size of RSJ would be sufficient? Accounting for 6x2/18mm OSB, 500kgs max lift on a RSJ mounted hoist, and maybe a dash of on snow on the roof?
In addition, the main door for this long term will likely be a roller door. The structural opening will be approx 2850 (keeping within a 3m door as they measure). The lintel for this, I thought I could use a fairly conventional cavity lintel, would this be ok at near on 3m span taking one course of blocks on both sides and the roof rafters directly above? I know block work normal distributes weight, one course this won’t happen.
Last question, I am on heavy clay soil, there are trees within a few meters of the build. They’re all well trimmed. We are torn as to the best footings. On paper conventional 1m footings looks fine. The trees however add a layer of complexity and my bricky has suggest a raft may be better. Having tried to do a roughy calculation the amount of concrete overall concrete for both they seem to need the same. Which would be best?
Thanks in advance for any help.
I am currently in the early stages of a garage/workshop build. I have (in my mind) the design I want. In simple terms the block work footprint will be roughly 7.7x6.7, overall height just under 4m. Having discussed this with my bricky he is suggesting a cavity wall (75mm) with some kind of medium to light density block. He also said this would negate the need for any internal piers given the long runs on block work.
The roof will be a simply dual pitch and will run left to right on 7.7m elevation. Having checked all local council planning documents it would appear this is possible with just regs.
I have designed and built previously at home myself, and did so with a large timber building within another part of property. I am keen to do the same with this, if I can. I have a very good friend who is a superb bricky and he is lined up for all ground works and block work. I will undertake all roof timber myself. I am still not sure on the final finish on the roof. (Either slate or metal panels)
I am keen to keep it with 4m overall height for a few reasons, one being retaining my own views from upstairs widows. But, I also however want to maximise all space within the structure by having a vaulted roof. I am confident spanning an RSJ from gable to gable would achieve this, along with the ability to use a block and tackle to maybe lift engines from cars etc. (Max load 500kgs). My initial thoughts either birds-mouthing the 6x2 rafters in to both the wall plate and RSJ. The ridge beam sitting the RSJ. I figured I’d need to make some OSB gussets to reinforce the join between both side, would doing this being enough to negate the structural integrity that roof joists offer?
My intention on the roof thereafter would be rafter spacing at 24” and clad competely with 18mm osb. Initially this will just be covered in normal shed felt - I haven’t yet decided if I want slate to match the house or black corrugated sheets.
Can anyone suggest what size of RSJ would be sufficient? Accounting for 6x2/18mm OSB, 500kgs max lift on a RSJ mounted hoist, and maybe a dash of on snow on the roof?
In addition, the main door for this long term will likely be a roller door. The structural opening will be approx 2850 (keeping within a 3m door as they measure). The lintel for this, I thought I could use a fairly conventional cavity lintel, would this be ok at near on 3m span taking one course of blocks on both sides and the roof rafters directly above? I know block work normal distributes weight, one course this won’t happen.
Last question, I am on heavy clay soil, there are trees within a few meters of the build. They’re all well trimmed. We are torn as to the best footings. On paper conventional 1m footings looks fine. The trees however add a layer of complexity and my bricky has suggest a raft may be better. Having tried to do a roughy calculation the amount of concrete overall concrete for both they seem to need the same. Which would be best?
Thanks in advance for any help.
