GH gypsum block: it has thickness: 50mm, 70mm and 100 with tongue and groove on edges. Dimension: 600mm x600mm. GH gypsum block installed by resembling groove and tongue to make wall and partition completely . GH gypsum block is tested in complying BS 476/22:1978 vàBS 476/4:1970 for fire - resistant Next >>>
ASTM C 1178/C 1178M-04 ASTM (AMERICAN STANDARD TESTING MATERIAL ) is established that taken part in by technical standard 132composion departments. Nowadays there are more than 9100 technical standards for testing, instructing and definition relate to materials, product, systems and services. ASTM issued a lots of standards for metal, chemical, petrol, fuel, garment, paint, plastic, rubber, pipe, energy, healthy equipments and others.. Next>>>
There are two reasons cause for the damp phenomenon:
First, wet atmosphere goes in to the main land from the sea matching the available cold atmosphere.
-The second, Southern and westernly wind increase at 1000 - 1500m height so it cover atmosphere.
The damp weather cause for diseases: articulation disease, cardiovascular, asthma, cough, headache and others due to discharge badly so we feel tired, headache and uncomfortable.