0 475 mm 28 gauge can be used for shelters when wind speed is lower than 250 km h in a region not subjected to snow.
													
																	Corrugated iron sheet thickness. 
									
	
		
	
																	Measuring thickness the other important measurement for corrugated roof sheets is thickness. 
																	Gague are used to specify the thickness of a metal sheet. 
																	This is expressed in gauges with a lower number indicating a thicker sheet and a higher number. 
																	The tolerance variation is directly related to and dependent on the specified width and thickness of the material to be roll formed. 
															
													
									
	
		
	
																	0 4 mm 30 gauge can be used for shelters when wind speed is lower than 200 km h in a region not subjected to snow. 
																	Stainless steels aluminium and copper. 
																	Regular ferrous alloys are the most common due to price and availability. 
																	Common sizes of corrugated material can range from a very thin 30 gauge 0 012 inches 0 30 mm to a relatively thick 6 gauge 0 1943 inches 4 94 mm. 
															
													
									
	
		
	
																	0 551 mm 26 gauge for permanent shelters. 
																	The most common materials for corrugated iron are ferrous alloys e g.