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UD
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The surfaces of all profiles are further protected by passivation using chromic acid. As humidity and weather in general can oxidise the material, producing white rust deposit on the surfaces of the profiles, we suggest you take the following measures:
store the profiles in covered and ventilated areas
keep the material away from corrosive substances such as combustion products, chemical vapours and dust from metal processing.
in the case of storage in open air (not suggested) arrange for the packages to be inclined so as to drain any water that may enter; protect the profiles with suitable " sheets, always ensuring that there is enough air circulation to avoid condensation.
Assembling the profiles
The UD 28/27 runners are fixed with dowels on the needed distance from the wall on the floor or the ceiling. For better sound insulation the distance from the wall should be at least 50 mm. Before the profile fixing over it a joint tape is stuck.
For strengthening of the CD 60/27 profiles on the half of the wall height (maximum distance 150 cm) acoustic vibration brackets or direct hangers are fixed using dowels. The joint tape under the acoustic vibration brackets prevents the direct surface contact. The CD 60/27 profiles are put in the UD 28/27 profiles and the distance between the axis is 60 cm. CD 60/27 profiles are leveled and screwed to the brackets using type-s screws LN 3.5/9 mm.
After the system and insulation installation the boards are screwed to the construction with self taping screws LB 25mm. The distance between the screws is no more then 25 cm.
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