These extended roof deck spans provide the uniform load capacity. Coefficients used to determine bending, shear, and end reactions are shown in our manual and in the Steel Deck Institute (SDI) specifications. Multiple spans are based on equal span lengths. For roof construction the user is cautioned to keep spans equal to or less than the recommended maximum span – which is based on SDI construction loading. In no case is the provided information meant to replace the calculations or judgement of the engineer of record.

	1.	For roof applications spans are generally assumed to be center to center of supports.
	2.	Bending, shear, combined bending and shear, and bearing are used to check the total allowable loads.
	3.	Live load deflections are limited to 1/240 of the span as per SDI. If another limit is desired simply ratio the load; i.e. if 1/360 is the limit multiply the live load by 240/360.
	4.	Both allowable stress design (ASD) and load resistance factored design (LRFD) values are shown. Make sure the appropriate load factors are used with LRFD – see page 15 of our manual. The LRFD "stress" loads have been calculated using a factor of 0.95.

	For more information email our engineering department.
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	Complete this form to receive your extended load tables. Deck Type: Select a deck B Deck F Deck N Deck BC Deck NC Deck Deck Yield Strength: 33 ksi 40 ksi Deck Gage: ----- Span Length: (Input in feet and decimal feet. i.e. 8' 3" should be input as 8.25.)

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