2 x 12s are not listed because you can span.
				
									
													Ceiling joist span chart. 
						
													Additionally compres sion perpendicular to grain design values f c are included as a consideration for selection of joists and rafters. 
													Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists. 
													This ceiling joist span table is based on the 2012 irc for uninhabitable attics with limited storage. 
													If this is the case with your structure use the floor joist table to determine maximum joist lengthload. 
											
									
						
													Use the following tables to determine the maximum unsupported horizontal distance that ceiling joists and rafters can span. 
													The resulting spans are less than the 2012 irc codes but they are to our standards at scotts framing. 
													Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. 
													Calculate the span for floor and ceiling joist with this free and simple online calculator. 
											
									
						
													Spans for ceiling joists shall be in accordance with tables r80241 and r80242. 
													For other grades and species and for other loading conditions refer to the awc stjr. 
													It covers 2 common lumber species and sizes at 20 pounds per square foot load. 
													We have engineered this calculator to provide spans which will. 
											
									
						
													Table r80241 ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf ld 240. 
													Although 2 x 4s are included in the official table they are not listed because it is never advised to use them. 
													Ceiling joist and rafter span tables. 
													Ceiling joists with l240 deflection limits. 
											
									
						
													Engineered wood products ewp span and size charts for bci joists. 
													The spans for joists according to the code is far more than we find acceptable. 
													The range of values in the tables provides allowable spans for. 
											
							  
		  
			
												 
						
							 
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