Do the roof trusses hold to lift column drill?

[jakim]

I am building a carport with an attached heated section. The exterior walls and the roof are finished with concrete tiles. The span of the roof trusses is about 8 meters. The trusses are of the "storage truss" type, which allows for flooring to create storage space.

I have a fine pillar drill press that weighs about 300kg, which needs to be moved into the heated section. I was thinking of using a chain hoist attached to a beam that runs across the lower part of the trusses and lifting it from the garage section to the heated section (which has a floor height about 30cm higher). Now I'm wondering if anyone thinks the trusses might not be able to support such a weight? The lift would take place approximately in the middle of the trusses. I'm attaching a picture of the garage before the exterior walls were finished.

 

[cheetah1]

I would recommend that you ask your takstolskonstruktör.

 

[Immobil]

It should hold, given that a reinforcement has been placed in the middle of the truss. But to be safe, I would support the truss with a stud/plank from floor to truss on either side of the lifting point.

 

[jakim]

One of the trusses serves as support for the wall, so there's only a hole for a double door, about 180cm. *Glömde* The wall studs are thus nailed to a truss except above the door. It should hold?

 

[Gabbe1]

I used my trusses to lift an IPE beam that weighed 330kg.
My trusses are also w-trusses, span 7m, and homemade by me.
For safety, I attached the chain hoist to a sturdy beam that I placed between two trusses, thus distributing the weight to two trusses.
I couldn't notice the slightest flex when I lifted the beam.

 

[jakim]

That sounds good, I'm in

 

[Immobil]

Please let us know how it went. If we don't hear anything, we'll assume it has collapsed. :eek:

 

[SCB]

Lifted a significantly heavier machine in weaker roof trusses than yours.
Distributed the load over two roof trusses and also had two supports of 50*100 between ceiling/floor on each truss.
No problems anywhere.

 

[MathiasS]

I would recommend that you ask your truss designer.

I would recommend a simpler empirical method.

Call two friends. Let them jump up and hang on the truss. If it looks stable, you also jump up and if it doesn't break, you know it works....

Theory is all well and good, but there are often simpler ways to come to a reasonable conclusion.