Tensile

The technical data and recommendations included in this Technical Guide are primarily based on CIB publication 257 “European Recommendations for Sandwich Panels”, the Certificate No. 163/01 issued by the Technical Research Centre of Finland and on practical experience. In countries where Paroc Panel System has type approvals or where a country has specific standards, panels and solutions are designed in accordance therewith and deviations may be made from this Technical Guide.

Paroc Panel System is only responsible for the properties of the panels included in this literature. Any other information submitted, e.g. on load assumptions, dimensioning, detail design and installation is to be considered as guiding information only. All rights reserved including the rights to product development and other changes as well as changes related to this Technical Guide.

Paroc® Fire Proof Panels are produced by Paroc Oy Ab, Panel System,

a member of Paroc Group, Finland. Paroc, Paroc Structural, JointSeal and FoodSafe are trademarks of Paroc Group.

C O N T E N T S

2.7.1Dimensioning of external wall, horizontal installation 27

C O N T E N T S

G E N E R A L

1 General

1.1Sandwich panels

A structure clad with sandwich panels should meet the following functional requirements during the building’s lifetime:

•load-bearing capacity

•protection against rain, snow and wind

•thermal insulating capacity

•fire resistance

•sound insulating capacity

•durability.

The following guidance demonstrates how these requirements can be met using Paroc Fire Proof Panels. The dimensioning rules for the panels mainly follow the contents of ECCS/CIB European Recommendations for Sandwich Panels. However, guidance given in local type approvals for Paroc Panels has to be followed in the first instance.

1.2Paroc Fire Proof Panels

1.2.1 General

Paroc Fire Proof Panels are prefabricated stone wool based lightweight sandwich panels. The facings are made of steel sheet and they act together with the Paroc Structural wool core to provide a composite action of high performance in strength and durability. The bonding between the core and the facings is performed by an adhesive which fully covers the surfaces.

AST, Advanced Structural Technology, results in secure strength properties, reliable long-term durability and fire safety in sandwich panels. The essential characteristics of AST panels can not be identified visually, but they can still be measured and controlled in the manufacturing process. AST is fully implemented in Paroc Fire Proof Panels.

1.2.2 Paroc Structural core

Paroc Structural wool is a special stone wool for use only in Paroc Panels, in which the wool fibres are uniformly aligned to achieve controlled strength properties and high durability. The Paroc Structural wool core comes in two types, C and F. The strength of the wool can be adjusted in two classes 50 and 75 referring to the shear strength in kN/m2. Different Paroc Structural wool types can be chosen according to required strength and fire properties:

•type 50C is used as the core of external and internal wall panels in normal use in buildings with normal fire requirements

•type 75C is used as the core of ceiling panels but can also be used as the core of external wall panels in case of higher strength requirements

•type 50F is used as the core of fire-partitioning wall panels with high fire requirements

•type 75F is used as the core of ceiling panels with fire requirements.

G E N E R A L

1.2.3 Facings

Paroc Panels have surfaces made of hot dip galvanized, substrate coated steel sheet. The two-sided galvanization guarantees the corrosion resistance of the steel. The sheet is pretreated for improved adhesiveness and permanence. The primer again ensures a good key for the coating. The exposed surface of the steel has a substrate coating and the reverse side consists of a special coating for bonding mineral wool.

Standard thicknesses of the steel sheet are 0.5 and 0.6 mm. The facing thickness is usually specified as follows:

•in external walls 0.6 mm sheet externally and 0.5 mm internally

•in internal walls 0.5 mm sheet on both sides of the panel

•in ceilings 0.6 mm sheet on the upper side and 0.5 mm on the lower side.

On request also other steel sheet thicknesses are available.

Standard surface coatings are PVDF, polyester and FoodSafe. Especially in high temperature interiors galvanized steel sheet with no substrate coating can be used. If high hygiene requirements exist different types of stainless steel sheet can be chosen. Galvanized and stainless steel sheets are available in 0.6 mm thickness.

For further information see separate brochure Colours and Coatings.

1.2.4 Dimensions and weights

Paroc Fire Proof Panels are manufactured with a modular width of 1200 mm and are delivered in specified lengths. The maximum length of the panel is 12 metres. In practice the length may be limited to ensure safe handling. The recommended maximum lengths are shown in table 2. The panel standard tolerances are as follows:

1) If higher demands, please contact Paroc Panel System.

G E N E R A L

Figure 1. Panel dimensions.

8.5

3

4

16

20

Modular width 1200

S T R E N G T H

2 Strength

2.1General

Paroc structures are dimensioned for load combinations in accordance with national building standards. The span curves and tables for Paroc Panels are made in accordance with European Recommendations for Sandwich Panels. They contain partial coefficients for both loads and material which means that the load characteristic value multiplied by the current pressure coefficient, c, can be directly used in the diagrams.

The span curves are valid for carbon steel facings only. For other facing materials, please contact Paroc Panel System.

2.2Loads

2.2.1 External walls

External walls are dimensioned for wind loads with load factors and pressure coefficients in accordance with national regulations. The wind load is a function of the building height. If allowed by national standards, the panels can be dimensioned for the prevailing wind load at any given height of a building.

Figure 2. Wind load as a function of building height.

S T R E N G T H

2.2.4 Vertical loads on panel edges

Paroc Panels do not transfer high vertical loads e.g. from roof structures. Yet in some cases the panel edges are subjected to vertical loads caused by e.g. the panel above or a window. The maximum allowed load on the panel edges is 2.5 kN/m.

The vertical load is normally transferred to the bearing frame by penetrating screws. More detailed information on the capacity of fixing screws can be found in section 7.

Figure 5. Maximum allowed vertical load when the exposed panel edge is covered with U-profile.

2.3Support width

The required support width for Paroc Panels is determined by the span, the current load directed on the panel, the panel length tolerance and the most practical way to install the panels. The span curves (figures 8 and 9) also indicate the maximum and absolute minimum support widths that have influence on the span. Between the curves it is possible to interpolate. The recommended minimum practical support width is 50 mm for walls and 40 mm for ceilings. In multi-span structures, the minimum support width of the intermediate support is 60 mm. Please note also the tolerances of the frame and the panels, see section 1.2.4.

Figure 6. Definition of a support width.

S T R E N G T H

2.4Spans

2.4.1 General

The dimensioning curves are drawn up in accordance with European Recommendations for Sandwich Panels with the following partial coefficients in the ultimate limit stage:

This gives a total safety of 1.5 x 1.25 = 1.88

In the serviceability limit state the panels are dimensioned for a maximum allowed deflection as follows:

•walls with load and temperature gradient: span/100

•walls without temperature gradient: span/150

•ceilings without temperature gradient: span/200.

2.4.2 Single-span walls

Single-span Paroc Panels are dimensioned according to following span curves. In figure 7 span curves are for walls without temperature gradient (internal walls). Span curves in figures 8 and 9 are for external walls with temperature gradient of 55 ºC.

The curves include both load and material partial coefficients. Therefore the load characteristic value multiplied by actual pressure coefficients can directly be used in the curves.

In fire-rated walls spans can be limited (see table 11).