First cracking load

Maximum sus-

tained load

Maximum defor-

mation without

cracking

Bonded RENOVA

system

>320 kN/mm

2

>320 kN/mm

2

>6 mm

RENOVA ULTRA

System

>7 kN/mm

2

>320 kN/mm

2

~1 mm

Conclusions.

The Technical Construction Standards of the Ministerial Decree

of 17th January 2018, paragraph 3.1.4 Variable Loads, define

two different stresses acting on the floors of structures,

variable loads, concentrated vertical loads Qk [kN] or uniformly

distributed vertical loads qk [kN/m

2

], with limits from 2 to 7

depending on the intended uses, and permanent non-structural

loads G2 with limits between 0.4 and 2 kN/m

2

.

One can therefore say that, based on the values obtained, the

samples are "compatible" with the minimum expected stresses

specified by the law for an intended use up to Cat. D2 with

regard to concentrated vertical loads Qk, and for any intended

use with regard to evenly distributed vertical loads qk.

Note: the limit of 320 kN/mm2 corresponds to the physical limit

of the machine used for the test in which, in the case of bonded

RENOVA, corresponds to the deformation of 6 mm cited. At

these values there was still no cracking.

Bending tests. The purpose of the test is to simulate the

application of the RENOVA System on elastic sub-floor, such as

a wooden floor in a renovation.

In the absence of a specific reference standard, the tests were

carried out by uniformly imposing a load on 100x100 cm panels

placed on two side support rails, in order to determine the

values of uniformly distributed vertical loads and the related

deflection.

CARICO UNIFORMEMENTE DISTRIBUITO

CARICO UNIFORMEMENTE DISTRIBUITO

Rigid surface

First cracking load

Maximum sus-

tained load

Maximum defor-

mation without

cracking

Support rails

Bonded RENOVA

system

>25 kN/mm

2

>70 kN/mm

2

~6 mm

RENOVA ULTRA

System

~2,86 kN/mm

2

>34 kN/mm

2

~0.35 mm

Note: this behaviour is related to a case in which the supports

are 1 metre apart from each other, which is much more severe

than a real situation.

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Underfloor Radiant Systems - Product Guide

23

Rigid surface