monorail

[nilaypathak]

In PreEng building, main two trusses running along the long side of building. Monorail supported by weld plated on bottom cord of there trusses. Bottom cord of HSS is 3 X2 X.188 and plate is 3/8 X4X6 with two holes for monorail bolt connection.
Does HSS thickness in enough to safe transfer of load and weld that plate to HSS? Monorail rated for 2 ton
Thanks for your time.

Please find attached Photo too.

Thanks,

 

[MikeHalloran]

You need local help with that.
Hire a structural engineer.



Mike Halloran
Pembroke Pines, FL, USA

 

[nilaypathak]

I am in between two structural engineers. One from inspection and testing agency, rcomended addtion work on that too handle desing load. And another engineer who design this, who has 20++ expreience.

 

[JedClampett]

Let's look at the good points. If you don't like the building very much, this might be a good way to demolish it.
You're adding a lot of heat to the bottom member of a truss. It's already tensioned from the Dead Load and whatever else it's supporting. So you're basically melting a portion of a member in tension. If it withstands the welding process, it might get notched. So now it's weakened by the notch.
As Mike said, hire a Structural Engineer. If he blesses this, you'll have someone to blame if it falls down.

 

[MikeHalloran]

Please tell me that image has been marked with a pen, and you didn't just weld through the paint.



Mike Halloran
Pembroke Pines, FL, USA

 

[msquared48]

The link below shows what happens when PEMB's are screwed with without a structural engineer.

I suggest you get one.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[Brad805]

My first question would be was the truss originally designed for a 2t moving load? Pre-eng buildings are typically designed for very specific loads and have very little reserve capacity. That mono-rail is clearly something a maintenance group added.

Brad