Floor Limit L 360

They are expressed as a fraction.

Floor limit l 360.

For example while joist manufacturers regularly meet the standard l 360 criteria for code construction with 24 o c. Clear span in inches l over a given number. For example the allowable deflection of a 12ft span floor joist with plaster l 360 is 0 4 12ft divided by 360. A floor joist appropriately selected to span 10 feet with an l 360 limit will deflect no more than 120 360 1 3 inches under maximum design loads.

Maximum deflection limits are set by building codes. When building codes set a deflection limit such as l 360 they do so assuming that framing won t be subject to loads in excess of a certain amount. If that same joist had gypsum ceiling l 240 the allowable deflection is 0 6. A floor joist appropriately selected to span 10 feet with an l 360 limit will deflect no more than 120 360 1 3 inches under maximum design loads.

And since it is small i will leave the source for where it is found here 1. On center systems these floors often have deflection between the joists exceeding l 360. Note it gives the allowable deflection based on a fractional span quantity so a larger denominator will yield less deflection. Please read everything on the attached photo below.

See the table below. They are expressed as a fraction. Recent research has shown tile to fail under some conditions when the floor is more rigid than l 360. Maximum deflection limits are set by building codes.