Acrow on a sloping floor

[jackg]

A concrete lintel (which was cast on site) over a doorway is supported on one end by a stone wall which has to be removed for some building work.
The lnitel is seven inches high by four inches wide with a wooden beam parallel with it.
The floor is tile-18mm chipboard-50mm Celotex-concrete slab.
There are about 11-12 concrete block resting on the top of the lintel which in turn support two purlins which overlap each other.
The roof has clay Double Roman which will be removed most of the area above the lintel.
A beam at right angles rests on the end of the lintel which supports the ends of the rafters but this beam will have its own Acrow.
The Acrow will be installed about 2/3 of the way from the opposite end of the lintel, so

Chock it I know. The dimensions of the slope is a 4.1/2" drop over 23", so a 20% incline.
I am guessing that the safe way to install the Acrow is on the slab with a chock and to remove the tiles-chipboard and Celotex?
One block weighs 14kg so 12 weigh about 160kg plus the purlins and the rafters.
Any advice on this would be welcome.

 

[tomfe]

Can't you do exactly the same as the picture? Use some bricks and a bit of wood to bridge the slope.

 

[theprinceofdarkness]

Quite, Get something like 3' of scaffolding board, one end on the flat bit, the other, over the lower flat bit and block up with a brick , chipboard off cuts and slivers of hardboard (and lino for the perfectionists).
Frank