Specifications:
The document provides specifications for roofing panels, including thickness measurements in various languages (Italian, English, German, French). It details the nominal thickness of steel sheets and their application in different support schemes, either with two supports or three or more supports. The thicknesses range from 0.50 mm to 1.00 mm, with corresponding inter-support distances provided in centimeters.

Procedures:
The document outlines the calculation of thermal transmittance (U-value) for panels with bitumized felt paper, considering the real thickness of the insulating core without the contribution of corrugations and surface resistances. The U-values are provided for panel thicknesses ranging from 30 mm to 120 mm.

Standards:
The document specifies allowable uniformly distributed loads with a safety coefficient of 2.5, using a conversion ratio of 1 Kg./m2 = 0.00981 KN/m2. The tables are developed with steel ribbed support, imposing a deformation limit of deflection f = 1/200 L.

Recommendations:
The document suggests using steel ribbed support for roofing panels to ensure structural integrity under specified load conditions. It emphasizes the importance of adhering to the deformation limits to maintain safety and performance.

Key Data from Tables:
The tables provide detailed data on inter-support distances for different nominal thicknesses of steel sheets, both for two supports and three or more supports. Additionally, thermal transmittance values are given for various panel thicknesses, highlighting the efficiency of insulation materials used.