Shimn / packers under steel beam?

[liamruairi]

I have finally bolted the steel beams together in the loft for our loft conversion, and there is a 6m beam bolted together resting on concrete blocks either end. There is about a 15mm height difference to make the beam level at one end needed. (The beam is probably sagging at the joint where its bolted.)
Question = what can I use as a shin / packer? Slate / mortar I've been told might crack and not be best practise. Steel shims / packers have been suggested but where can I find these? Am guessing plastic backers are not good enough? The beam supports the wooden joists that meet in the middle of the space.

Cheers.

 

[Notch7]

A bit of flat mild steel plate.

A structural steel company or a local engineers.

Offcuts are often sold on ebay.

 

[^woody^]

Are these beams bearing on to a padstone?

 

[liamruairi]

Yeh they’re sitting on concrete bricks (acting as padstones)

 

[tony1851]

Concrete bricks are not the same as padstones, but never mind.

 

[Ian H]

I got a 100x100x10mm spacer from the place I got my steels, they didn't charge me and made me a coffee when I picked it up

 

[liamruairi]

Concrete bricks are not the same as padstones, but never mind.

No I know but was told by the structural engineer and by bc they’d suffice as they are sitting on single course of bricks anyways

 

[^woody^]

2:1 mortar. Slate. Clay roof tile.

You might want o straighten the beam while you are at it if it's holding the floor up