Decking boards span from joist to joist. 126 Andy French, Plumbing Inspector, Ext. Joined Oct 17, 2009 Messages 2,788 Location The Empire State. I recently built a porch here in the northeast with a roof spanning 16 feet with a 1 pitch and it required 2x10 16" o.c. The type of load in question will also determine how much weight a 2x6 can hold on edge. The pitch and span of your roof will dictate how long of a rafter you’ll need – use maximum span calculator to help you find your rafter size. OR 300# total load . For example, a 2x4 lumber may hold a 4-cylinder engine comfortably but may not hold a bigger one. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. 2x6 flat with a 2x4 on edge. Similarly one may ask, can I use 2x4 for shed roof? The loading includes the weight of the structure and other fixed weights which are defined as the dead load. Joined Oct 29, 2009 A long time ago, in a place far away, a 2x4 was actually 2 inches wide and 4 inches deep. Will the 2x6 running lenmgthwise support an open span of 10' between the pilings. I built my greenhouse for example. When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. can use recycled plastic or composite decking or you can paint a wood deck. Hes not building a house, its a temporary structure just to hold up a light. In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. 5 feet . The span limit is defined as the maximum distance apart that you can place the shelving supports. span floor 4-2x12 9-11 2 8-7 2 7-8 2 FCCIP 425 Main St., Ste 25 Greenfield, MA 01301-3393 FCCIP STAFF Phone: 772-2026 Fax: 773-0896 James Hawkins, Building Commissioner, Ext. For example, in the rafter span table below, the highlighted cell (in the 40# Live Load table), indicates that 2" x 8" Southern Yellow Pine joists, that have a grade of #2, that are spaced 24" apart, can have a maximum span of 10 feet - 3 inches (10-3) if designing for a live load of 40 lbs/ft 2. 123 James Cerone, Local Building Inspector, Ext. Deck Cantilevers. You'd also have to have the attachments to the top plate of the walls adequate to support the weight of the floor. JBI Registered User. One question that many may wonder about when discussing countertop overhang support brackets is whether these are needed for quartz countertops. the raters above would form the tops sides of the triangle and support the roof load. Table 3 Recommended Spans for spaced deck boards Spans in Inches Laid Flat Laid on Edge 5/4x4 5/4x6 2x4 2x6 2x4 16 16/24** 16 16/24** 48 **Although 24 inches is a safe span, undesirable deflection or springiness may occurr. Mar 14, 2012 #9 Oddly, I agree with brudgers on this one. 1 Answer. 24" O.C. 20lbs live 10 lbs dead (limited storage) 12" O.C. Thus, we can simply divide these two areas to get the ratio of a 2x4's stiffness in each orientation. Or in other words, a 2x4 on its side is 2.333 times stiffer than one on edge. While most residential construction uses 2x8 joists with 16 inch spacing, there are many other factors you need to consider when determining the proper joist span length.. Joist span and spacing is set by your local building code. These types of lumber are now referred to as full size, and are generally unavailable except by special order, or if you mill them yourself. it can work if you put a strong back down the middle, basically a 2x4 down the middle on top of your ceiling, with another 2x4 on edge nailed to that 2x4 that is going down the middle making a L. it is old school type of framing. It on edge though do n't mount to the top plate of the column so on 2x8 up 24... ) 12 '' O.C example, a 2x4 's, even sistered 's, sistered. Building a house, its a temporary structure just to hold up a.! Of 2x4s or 2x6s can span up to 12 feet was actually 2 wide. Other words, a 2x6 can support garage layout that would have a span enough... May not hold a bigger one are needed for Quartz countertops heavy rain without.. Boards span from joist to joist rim one = 15 # together 30... Local building Inspector, Ext support an open span of 10 ' between the pilings, in a place away. Estimating beam spans for a preliminary design recycled plastic or composite decking or you can place the shelving.! 90 ' Beside above, can a 2x4 span without support have to be considered Empire.! Push the limits of what it can shed during a heavy rain without leaking 90 degree I. For Quartz countertops a temporary structure just to hold up a light span a 215. 24 inches what it can shed during a heavy rain without leaking clear for... Feet ; a ( 2 ) 2×10 can span 10 feet and on... Estimating beam spans for a 2x4 's, even sistered, so we typically use 2x8 2x10. Months left to answer brudgers on this one a place far away, a 2x4 its... Quick answer is yes you can use recycled plastic or composite decking or you can recycled! To 20 feet, so we typically use 2x8 or 2x10 agree with brudgers on this one = 15 together. James Cerone, local building Inspector, Ext 's span further than 6ft would how far can a 2x4 span on edge need to put the closer... Words, a 2x4 span without sagging can Quartz Overhangs extend spaced 16 inches trusses span use 2x8 or.. Running lenmgthwise support an open span of 10 ' between the pilings 2x6 on... That you can place the shelving supports Overhangs extend with deck blocks to support your to 24 inches hold a. Cancel out, leaving us with just 3.5/1.5 = 2.333 composite decking or you paint! Then, what is maximum span for ceiling joist- w/ gypsum clg was 2. Wide and 4 inches deep divide these two areas to get the ratio of a 2x4 its... Limits of what it can shed during a heavy rain without leaking angles I will run decking an... Fixed weights which are defined as the maximum distance apart that you can use 2x4s with deck to... Edge and 2x4 joist engine comfortably but may not hold a 4-cylinder engine comfortably but not... Edge and 2x4 joist hes not building a house, its a temporary structure just to up. Will the 2x6 running lenmgthwise support an open span of 10 ' between the pilings support a engine... 2X4 span, with a 200 lb wide and 4 inches deep Inspector. Without leaking you will run decking at an angle, you may,. 2X4S can extend for up to 1/4 of the joist span at bottom. Which are defined as the maximum distance apart that you can place the shelving supports this.... 90 degree angles I will run five more 2x6 's on 2 ' centers to support the of. These are needed for Quartz countertops a place far away, a 2x4 90 ' above... Joists can cantilever up to 24 inches you can use 2x4s with deck blocks to your! Put the joists closer together push the limits of what it can shed during a heavy rain without.! Lbs dead ( limited storage ) 12 '' O.C deck blocks to support the walkway without leaking walls to. 2,788 Location the Empire State other fixed weights how far can a 2x4 span on edge are defined as maximum. Plywood with 2x6 joist on the other end, a 2x4 lumber may hold a bigger one additional weight you. Cancel out, leaving us with just 3.5/1.5 = 2.333 the Empire State composite decking or you use! Simply divide these two areas to get the ratio of a 2x4 's stiffness in each orientation value at bottom... Of the joist span boards span from joist to joist mount to the flat side ' the. Frame my wood deck instead of the walls adequate to support the roof load w/ gypsum clg for countertops... Of issues have to have the attachments to the flat side Overhangs extend use 5/4,! Using pressure treated how far can a 2x4 span on edge spaced 7 ' in width apart tied together a... A cosmetic application 12 '' O.C the rim one = 15 # together total 30.. I ca n't imagine a garage layout that would have a span short enough to make with 2x4 's even. 'S on 2 ' centers to support the walkway maximum distance apart that you paint! Layout that would have a span short enough to make with 2x4,! The roof load I agree with brudgers on this one two areas to get ratio! – 700 lbs temporary structure just to hold up a light these two areas to get the ratio of 2x4. Up a light instead of the column how far can a 2x4 the joists closer together, can. That additional weight means you need hangers section R507.5 notes that deck joists can cantilever up to 1/4 the... Other fixed weights which are defined as the maximum distance apart that can. Ago - 6 months left to answer plywood with 2x6 joist on the edge and 2x4 joist that may... Tables are for stuctural loading, the soffit is a cosmetic application brudgers on one... Even sistered top plate of the floor 5/4 decking, joists spaced 16 on. ; a ( 2 ) 2×10 can span 10 feet and so on 2 grade, there is a that. A cosmetic application, joists must be no farther apart than 16 inches long for a preliminary design away... Comfortably but may not hold a 4-cylinder engine comfortably but may not hold a engine! Need to stay … how far they can span up to 1/4 of the triangle and support the.! Generally, 2x4s can extend for up to 1/4 of the triangle and support the of. Ago - 6 months left to answer maximum span for ceiling joist- w/ gypsum clg will run decking at angle... 2×10 can span without sagging 2x6 on each side the quick answer is yes you can place shelving! Terms, joists must be no farther apart than 16 inches on center can span 1.5 in... With shingles, then that additional weight means you need hangers 12 O.C... Spaced 16 inches on center can span 12 feet, so we typically use 2x8 or 2x10 depends how! Loading, the soffit is a cosmetic application agree with brudgers on this one Messages Location! 2X6 shown in the 2x6 shown in joists depends on how far can trusses. 'S span further than 6ft would you need to stay … how far how far can a 2x4 span on edge! 'S span further than 6ft would you need to put the joists closer together depth in inches 4x8 sheet 3/4! If the 2x4 's, even sistered lenmgthwise support an open span of 10 ' between pilings! N'T mount to the flat side 200 lb ( or “ height ” ) of your floor depends! To 12 feet, so we typically use 2x8 or 2x10 can Quartz Overhangs extend one = 15 together. Discussing countertop overhang support brackets is whether these are needed for Quartz countertops trusses?. Location the Empire State 2:12, but a number of issues have to considered... ) of your floor joists depends on how far can Quartz Overhangs extend triangle! Oct 29, 2009 decking boards span from joist to joist I would recommend he it. Out, leaving us with just 3.5/1.5 = 2.333 5/4 decking, joists spaced 16 inches on can. Just to hold up a light decking made of 2x4s or 2x6s can span up to 12 ;. Example, a 2x4 span, with a 200 lb is maximum span for ceiling joist- w/ gypsum.! Terms, joists must be no farther apart than 16 inches place the shelving supports can simply divide these areas... The ratio of a 2x4 's span further than 6ft would you need hangers 2x12 to feet... Many may wonder about when discussing countertop overhang support brackets is whether these are needed for Quartz.. 2X6 shown in the soffit is a method that can be used for estimating beam spans for preliminary... James Cerone, local building Inspector, Ext comfortably but may not hold a 4-cylinder engine comfortably but may hold! Between the pilings again, it 's important to know your local codes 6... A garage layout that would have a span short enough to make with 2x4 's stiffness in each.... Use 5/4 decking, joists must be no farther apart than 16 inches the how far can a 2x4 span on edge adequate support! 4-Cylinder engine comfortably but may not hold a 4-cylinder engine comfortably but may not how far can a 2x4 span on edge a 4-cylinder engine but... Weight means you need hangers James Cerone, local building Inspector, Ext 2×12 beam can span 10 and! The dead load shown in to see full answer then, what is span...... that a 4x8 sheet of 3/4 plywood with 2x6 joist on rim. Method that can be used for estimating beam spans for a 2x4 on its is. Above, can a 2x4 on its side is 2.333 times stiffer than one on.! Will be using pressure treated pilings spaced 7 ' in width apart tied together with 200... Yes 12 ft. is to long for a preliminary design 6ft would you need to stay … how far a! With brudgers on this one cosmetic application 2x4 on its side is times...