What size steel to replace a pillar ?

[massey 6480]

Have a shed here 100ft x 40 ft . 20ft bays shed is made of 8x5 pillars and roof trusses. Looking to remove 1 pillar to give 40ft clear access . Have had 2 lads get back to me with steel sizes and both different . One recommends 254 x 146 the other with 305 x 165 . First lad says the big size steel is over kill and not needed . Opinions appreciated.

 

[Sharpy]

Have a shed here 100ft x 40 ft . 20ft bays shed is made of 8x5 pillars and roof trusses. Looking to remove 1 pillar to give 40ft clear access . Have had 2 lads get back to me with steel sizes and both different . One recommends 254 x 146 the other with 305 x 165 . First lad says the big size steel is over kill and not needed . Opinions appreciated.

When have you built something and then said to yourself "I wish I had skimped a bit on materials, I'm sure we will never get extreme weather"

 

[massey 6480]

I don’t want to skimp on it at all . Should have added his reason . He says no need to go that big for a single skin galv sheeting roof . If shed was wider he’d go bigger steel .

When have you built something and then said to yourself "I wish I had skimped a bit on materials, I'm sure we will never get extreme weather"

 

[RWG Contracts]

Have a shed here 100ft x 40 ft . 20ft bays shed is made of 8x5 pillars and roof trusses. Looking to remove 1 pillar to give 40ft clear access . Have had 2 lads get back to me with steel sizes and both different . One recommends 254 x 146 the other with 305 x 165 . First lad says the big size steel is over kill and not needed . Opinions appreciated.

personally I don’t think the 254 is big enough

 

[David.]

It won't be the weight of the wriggly tin that is the problem, the snow loading may be.

 

[goldeneagle]

Imagine there won’t be a massive difference in price between 2 for what you are doing so would take the bigger section.

Always gives an allowance for corrosion which is never a bad thing.

You get guys that are adamant that their steel sizes are fine but things move on and accepted sizes change.

 

[Blue.]

40’ is a wide span for 254,I’ve 30’ done with an 18” steel but it’s 45’ deep and fibre cement roof.

 

[HatsOff]

254 might work strength wise but I reckon it'd deflect a fair amount over that span. I'd go bigger.

 

[teslacoils]

Are either of the quotes based on a structural engineers assessment? Or do they come with a warranty at all?

 

[B R C]

Wouldn’t you need to beef up the stanchions to get any sort of warranty? It’s likely this shed is not at current specs for new build anyway?

 

[massey 6480]

Neither man mentioned doing anything to the stanchions .

Wouldn’t you need to beef up the stanchions to get any sort of warranty? It’s likely this shed is not at current specs for new build anyway?

 

[massey 6480]

No this was just a basic question I asked 2 different shed men to see if it could be done . And the answers they came back with .

Are either of the quotes based on a structural engineers assessment? Or do they come with a warranty at all?

 

[Mur Huwcun]

Neither man mentioned doing anything to the stanchions .

Existing stanchions will need beefing up or replaced to stop the twisting force at the top. Maybe, just maybe you could weld C channel into the web to avoid replacing then.

 

[Forever Fendt]

Have a shed here 100ft x 40 ft . 20ft bays shed is made of 8x5 pillars and roof trusses. Looking to remove 1 pillar to give 40ft clear access . Have had 2 lads get back to me with steel sizes and both different . One recommends 254 x 146 the other with 305 x 165 . First lad says the big size steel is over kill and not needed . Opinions appreciated.

Both to small to do a proper job and braces will need adding to stop middle frame deflecting beam outwards

 

[massey 6480]

What size would you be using to do this

Both to small to do a proper job and braces will need adding to stop middle frame deflecting beam outwards

 

[glasshouse]

Have a shed here 100ft x 40 ft . 20ft bays shed is made of 8x5 pillars and roof trusses. Looking to remove 1 pillar to give 40ft clear access . Have had 2 lads get back to me with steel sizes and both different . One recommends 254 x 146 the other with 305 x 165 . First lad says the big size steel is over kill and not needed . Opinions appreciated.

Put door on gable

 

[Forever Fendt]

What size would you be using to do this

406x178x60

 

[sgoti]

if i was doing it i would put 2 new posts to hold the beam. as you said the raffters are trusses so im geussing the shed is quite old.

a customer of mine had plans done by a structual enginer a couple of years ago for a 40x60ft, 20ft bays. with the beam spaning 2 bays. if i remeber corectly the carrier beam was 406x something and the posts holding it up ether end was 254x146x54

 

[massey 6480]

My bad what i meant by roof truss is that roof steel is also made from 8x5 steel beam same as pillars

if i was doing it i would put 2 new posts to hold the beam. as you said the raffters are trusses so im geussing the shed is quite old.

a customer of mine had plans done by a structual enginer a couple of years ago for a 40x60ft, 20ft bays. with the beam spaning 2 bays. if i remeber corectly the carrier beam was 406x something and the posts holding it up ether end was 254x146x54

 

[massey 6480]

406x178x60

Would the pillar`s need up grading aswell then .