1. Onye nrụpụta ma ọ bụ onye na-enye ngwọta, ọkachamara ma tinye ọkọlọtọ mba ụwa ASTM BS EN40 n'ọrụ na imewe na mmepụta. 2. Ịgbado ọkụ nke ọma, ịgbado ọkụ anaghị agbapụta agbapụta, enweghị ntụpọ n'ọnụ, elu dị larịị na-enweghị ihe ruru unyi. 3. Usoro ịgba ntụ ntụ, mkpuchi ntụ ntụ plastik polyester dị ọcha, nrapado siri ike, iguzogide UV. Ọkpụrụkpụ ihe nkiri karịrị 10um, nrapado siri ike. 4. Teknụzụ galvanizing ọkụ, elu dị n'ime na nke dị n'èzí site na micron 75 n'elu ọgwụgwọ mgbochi corrosion zinc coating hot dip. 5. Ọrụ otu nkwụsị maka ọrụ gọọmentị: nhazi mbụ, akwụkwọ nwa oge, usoro mmepụta njikwa mma, ntuziaka injinia maka nrụnye 6. Ọkachamara n'ihe gbasara ngwaahịa ígwè dị n'èzí, ike iguzogide ifufe, ike iguzogide nchara, ndụ ruo afọ iri ise.