DONE WORKS

Conservative restoration work on a private home

Location : Valpolicella

• Renovation year : 2020
  

The rural building that dates back to the early 19th century is located in the heart of Valpolicella (VR), spread over 2 floors plus attic. In agreement with the client and with the structural engineer Mattia Sartori (Studio Sartori – VR), the reinforcement of the wooden floors was carried out with the LPR40® system and the LPRZS® plate system for the perimeter connection of the stone walls. tuff of the building, while on the ground floor the restoration of the perimeter walls was carried out using a PETER COX® chemical barrier.

With the construction supervision, a check was made on the state of conservation of the beams, identifying those to be replaced because they were too damaged.

Subsequently, the static tests highlighted the goodness of the operation, confirming an arrow of less than 1/500 of the calculation span with civilian loads.

The first operation envisaged was the positioning of the Peter Cox separator sheet (waterproof and vapor-permeable to avoid the formation of condensation between the concrete slab and the planking).

The LPRZS® plates were then placed in correspondence with each head of the beams, taking care that it was well positioned on the center line.

After the LPRZS® plates, the TRALICCIO LPR® was laid which was screwed to the plate and to the underlying beams with din 571 wood screws according to the laying scheme (after pre-drilling with a wood tip).

Once the installation of the LPR truss has been completed (with the possibility of also being positioned upside down in the case of round or narrow beams – see photo) you start drilling the masonry (on the guides of the LPRZS plate) taking care to clean the holes from residual dust.

Ps. The depth of the holes depends on the thickness of the masonry, generally it is equal to ¾ of the thickness itself (in the specific case 30- 35 cm).

The hole in the wall is 12 mm diameter for a 10 mm diameter steel bar.

A certified bi-component resin is injected into these holes and an M10 steel bar is inserted.

After drying, the LPRZS plates were fastened with the tightening nuts.

In evidence in the photo below the LPRZS plate and the LPR truss when the work is completed.

The LPRZS truss system allows anchoring to the wall that exploits the root effect to connect the floors with the perimeter wall.

The installation of the system is finished, you can see the LPR® truss and the LPRZS® plates both orthogonal (with the bars that also connect the trusses) and longitudinal. Once the electro-welded mesh has been fitted, you are ready for the concrete casting.

The intervention of perimeter connection and the reinforcement of the building floors allow to increase the seismic class by creating a perimeter ring that works inside the walls with load distributed over the entire length and thickness of the walls avoiding concentrated loads, as can happen with large single tie rods.