楼的通风口

COMPANY PROFILE: We have own factoryCertified by ISO9001 our firm have 28-year history.Connect person : Anny WangMobile NO. : 86-13663282399pl send me your inquiry or send me your email adress by your mobile . thank you ! Product description1) Bearing Bar (Load Bar) Specifications (mm): The specification of plain type and serrated type bearing bar is 20 x 3 to 100 x6;the specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, etc. 2) Bearing Bar Pitch (center to center): 12.5, 15, 30, 34, 40, 60mm etc, also be according to client's requirement and 30,40, 60mm are recommended, America standard is available. 3) Cross Bar Pitch (center to center): 38, 50, 76, 1001 101.6mm etc, also be according to client's requirement and 50, 100mm are recommended, America standard is available. 4) Material: Mild Steel (Low Carbon Steel) or Stainless Steel 5) Surface Treatment: Untreated, Painting or Hot dip Galvanizing6) Steel grating standards: A) China: ISO9001 B) USA: D&B NO. 52-903-8909 E) Japan: JJSsteel grating,stainless steel grating,plain steel grating,galvanized steel grating,hot dipped galvanized steel grating.