I see that you do not know anything about engineering blogs. Your title is a useless title that will not help anyone in a search of topics. CR4 and all engineering blogs are communities where engineering is discussed (along with other amusing trivia). This is not the place to obtain authorized engineering specifications of any installation. You should contact your installer, any governing regulators for your location (I don't think that there is one in Khartoum Sudan) or ask an on site qualified individual that can inspect your installation. You should expect to pay a fee for this knowledge.
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"Don't disturb my circles." translation of Archimedes last words