PWS-PIR-CH-220 - wall sandwich panel for cold storage - polyurethane foam - visible fastening

Given that dark-colored panels from Group III are subject to significantly greater thermal loads than very light- and light-colored panels from Groups I and II, it is necessary during the design phase to assess, depending on the loads, which panel layout on the wall is feasible (single-span, two-span, multi-span), and whether a horizontal or vertical layout is appropriate. Furthermore, selecting the maximum panel length is a very important consideration. The load-bearing structure must be designed to accommodate the appropriate static configuration of the panels, taking into account the widths of the supports (transoms and purlins), their maximum spacing, and the number of fasteners.

In addition, during the design process, special attention should be paid to ensuring that the following conditions are met:

• The fastening method and static configuration must comply with the permissible load tables and spans (criteria met—ultimate limit state, serviceability limit state)*

• The length of the panels should be selected so that they comply with the restrictions specified by the panel manufacturer**

• It is absolutely essential to take the assembly temperature of the panels into account***

• Panels with smooth-profiled cladding may be used/installed only in a single-span configuration

* For dark-colored panels, single-span configurations are recommended; otherwise, deformations of the panel’s exterior cladding may occur at the intermediate supports that are unacceptable to the Client. The undulations in question meet the requirements of the PN-EN 14509:2013-12 standard in terms of permissible deviations; however, they may impair the panels’ appearance, potentially leading to customer complaints.

** The maximum panel lengths should comply with the manufacturer’s guidelines, depending on the type of panel and its application (roof/wall)—see PANEL LENGTHS. The Pruszyński Company does not provide a warranty for dark-colored panels longer than those listed in Section 4, Table 2, unless such use has been previously agreed upon in writing with an authorized representative of the Pruszyński Company.

*** The assembly of PIR sandwich panels with dark-colored claddings (Color Group III) should be carried out when the outdoor air temperature is between +10°C and +35°C.

Immediately before assembly (~20 min. ), the dark cladding of the sandwich panel (usually the outer cladding) should not be exposed to direct sunlight, as this may cause the panel or cladding to overheat and deform.

The wall panels in a stack are arranged with the facade side facing up. It is recommended to shield the cladding on the facade from the sun. If the panel bundles on the construction site are stored in a sunny location, it is recommended to set aside the first panel in the bundle, cover it, or rotate it so that the inner side of the panel faces the sun. Subsequent panels removed from the stack should not be exposed to the sun for more than 20 minutes before they are installed.

The table above shows a classification by color group for the individual colors available in the Pruszyński Company product line.
Please pay attention to the above factors during assembly, as outdoor air temperature affects the aesthetic appearance of the facade and the proper performance of the panel. In this case, panel deformation and damage are caused by the high elongation of the cladding (e.g., at summer temperatures) relative to its initial length (the length of the cladding at the time of assembly). Assembly of sandwich panels in light and very light colors (Color Groups I and II) should be carried out at outdoor air temperatures ranging from +5°C to +35°C, while panels with dark-colored cladding (Color Group III) should be installed at an outdoor air temperature ranging from +10°C to +35°C.

Failure to follow the above guidelines may result in surface deformation of the panels and localized loss of stability, for which the manufacturer assumes no liability. For colors not listed in the table, please contact a Pruszyński Company technical advisor. The color of the panel may be changed only with the designer’s approval.

Recommended modes of transportation for sandwich panels:

• a truck (tractor unit + semi-trailer with a length no shorter than the length of the loaded panels) with an open semi-trailer or one that allows for side loading on both sides along its entire length
• The load weight must not exceed the permissible load capacity of the vehicle combination,
• Transport straps should be placed on the load at intervals of no more than 3 m, but no fewer than 2 straps per package—the tension of the straps must not cause the slabs to deform.

Sandwich panels should be stored in stacks; a maximum of two stacks may be placed on top of each other.

The table below lists the maximum number of panels that can be packed together in a single package.

• It is recommended to store the panels on a level surface (yard, warehouse) on joists or polystyrene pads, which must be spaced no more than 2.5 m apart (for panels with a total length of up to 2.5 m, use at least 3 blocks).
• A maximum of two stacks of boards up to 6 meters in height may be stacked on top of each other; stacks of boards exceeding 1 meter in height must be stored individually. All stacks of boards must be stored on a level surface with proper drainage.
• When storing panels on a construction site, they must be protected against mechanical damage, UV exposure, harsh environmental conditions (acids, fertilizers, salts, and other corrosive agents), precipitation, strong winds, and other factors.
• It is recommended to store packages under a roof in well-ventilated areas
• The panels should be stored on a level surface (yard, warehouse) on joists, on polystyrene or wooden supports, which must be spaced no more than 2.5 m apart (for panels with a total length of up to 2.5 m, use at least 3 supports).
• Protective films are used to provide additional protection for the surfaces of the panels against mechanical damage, stress, and impacts that may occur during transport or handling. These films do not exempt users from the obligation to properly secure the panels during storage.
• It is recommended to remove the protective film before installing the components on the building’s facade or roof. The film should be removed when the air temperature is above freezing, because at sub-freezing temperatures the adhesive delaminates and some of its components may remain on the sheet metal.
• Improper storage of the sheets may make it difficult to remove the protective film and may leave adhesive residue on the surface of the sheets. In such cases, the Manufacturer will not honor claims regarding adhesive residue left by the protective film.
• For panels with hidden fasteners, be sure to remove the film from the inside of the longer lock before assembly.

ATTENTION!!!

For wall panels with visible fastening (applies to PIR panels), the top side of the panels in the package is the facade side—please pay special attention to this!

To extend the service life of roofs and facades made of coated sheet metal, they should be inspected and maintained regularly.

• Inspection – Once a year (preferably in the spring), you should inspect the roof and exterior walls to detect any damage early on.
• Cleaning Sheet Metal – Roofs and facades made of coated sheet metal require cleaning at least once a year. Dirt that accumulates on the sheet metal can cause uneven discoloration (due to uneven exposure to UV rays) and reduce corrosion resistance (dirt traps moisture on the sheet metal, gradually damaging it). Dirty and stained areas can be cleaned with a soft brush and water (max. 60°C). If necessary, a mild detergent (pH 6–7, max. 10% solution) may be added to the water. Pressurized water (max. 100 bar) may also be used for cleaning; however, the water jet must not be directed too close to the panel surface (min. 30 cm) nor perpendicular to the surface. At the joints, the water jet should be directed downward to prevent pressurized water from penetrating the gaps around the joints. Old panel coatings must be handled with extreme care. Cleaning should be performed from top to bottom, and the cleaned area should always be thoroughly rinsed with clean water immediately.
• Do not use scouring powders, nitro solvents, chlorine-based solutions, aromatic cleaners, or products containing ammonium chloride or sodium salts.
• Damage — Any damage that occurs during the Warranty period must be discussed with the roofing/facade contractor and may be repaired only with the contractor’s written consent. Repairs to small areas are carried out using air-drying touch-up paints, while painting large areas is generally only possible using special industrial paints designed for the renovation of coatings. The surface to be painted should be limited only to areas that require it (scratches down to the metal, corrosion spots, etc.). Surface preparation for painting should be performed in accordance with generally accepted guidelines. Always thoroughly remove all traces of corrosion—preferably using special brushes or fine-grit sandpaper. Next, the surface to be repaired must be thoroughly dusted, degreased, and cleaned. To degrease the surface, you can use extraction gasoline or water with added surfactants (preferably with a 1–2% ammonia solution). The repaired areas may show color differences compared to the original sheet metal colors due to natural atmospheric effects (aging of the paint under the influence of UV radiation).
• CAUTION—Health and safety rules must be strictly observed during inspection, cleaning, maintenance, and repairs.

Pruszyński Company Sp. z o.o. is not liable for any accidents that may occur as a result of performing the above activities.