My plan was to pour concrete footings, then run doubled up 2x8 beams setting on the footings. That was 'Mr.Jinks,  of the Huckleberry Hound Show, chasing the the two mice 'Pixie and Dixie'. - M.K. You will get most of any bounce on a deck from the span/size of the joists, not the decking, so one up your joists for a sturdy deck. I can confidently say that I expect to be a life-long subscriber." Building codes for residential decks only require 40 psf. But there's alot of work associated with this method such as adding posts, piers, etc. Also a " strongback" would help ( 2x4 running lengthwise,flat to ceiling w/ another screwed in an L shape to side of it) tremendously in my exp. The cube of 1.3636 is 2.5357, so the stiffness value of the 2x8 by itself is 2.5357 times the stiffness value of the 2x6. It will stiffen the floor to a point, but also add weight. Decking made of 2x4s or 2x6s can span up to 24 inches. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. © 2020 The Taunton Press, Inc. All rights reserved. live load floor joist span … The absolute stiffness and deflection numbers are not calculated, only relative values. Not often. who was the cartoon caracter that used that phrase ????? CULPEPER PORCH FLOORING is a superior choice to help you enjoy that lazy summer day. 2x10 vs 2x8 or 2x6 For trailer deck? Added to that is the powder post beetle damage.Basically, anything I do is going to help. For a low deck like this I would run 3 doubled 2x8… Price it out and see. Thanks for the reply.I'm looking at 10 feet between walls that is being spanned. Find the correct deck joist spacing and span before you start building. If the span is only 8 ot 9′ then yes, they will work. 112 Fourth Street P.O. Sistering the 2x6 would be my next option. Podcast 305: Asbestos Flooring, Panned Return Ducts, and Adding On to a Log Home, Podcast 303: Advanced Framing, Wood Floors in a Bathroom, Unsafe Pools, Plus, get an extra 20% off with code GIFT20, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. (like a flinch beam) The wider you make the rip the stronger it will be and I would keep the grain going horizontal. The ends of the span are much less important. What seams? Drill 4 each tight fit 1/4 inch dia holes on 2" spacing at each end of the strap, strap goes to within about an inch of the end supports (no need to be in bearing) ,  then continue the holes toward the middle, the spacing can increase by an inch each hole till you get to the center. Boss Hog has instructed us that the "feel" of a floor depends on its resonant frequency as well as the the actual deflection. 2x6 Douglas Fir Tongue and Groove Decking As one of the hardest and most dense of the softwood species, Douglas Fir makes a practical, as well as a beautiful, addition to your home. If you use 5/4 decking, joists must be no farther apart than 16 inches. In this case the notched 2X8 will provide almost exactly the same stiffness as an un-notched 2x8… Quote:for a coop 2x6 should be plenty.If you are using a concrete deck base,why not just put it on a concrete paver or big flat rockunder it.If and as it settles you could always just jack up that side and re-block it level. - posted in Machinery: I have to replace boards on my stock trailer floor, the boards are 5 ft going width wise. You may have to attach the sisters rigidly to the original joists (i.e. Viewed 60k times 14. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you dig you really got to get down below the frostline or you are wasting your time.For a coop … I may be wrong. The majority of the bending stress is closer to the center of the span; that's where he needs the most material added. in a previous dicussion on this issue, it was pointed out that making the notch cut with a jigsaw to spread the forces along a curve instead of focused on a point in the grain, this is reduced. I can't testify to that, but it sounds like it would reduce some splits. The 5/4 decking (pronounced "five-quarter"), available in cedar and pressure-treated fir, is 1 inch thick and 5-1/2 inches wide with rounded edges … For pressure-preservative-treated southern pine no. • If you angle or curve the notch you spread out the stress point and splitting is reduced or eliminated. If possible, your best bet is to add more 2x6 so that you end up with 2x6 @ 12" oc. "seams on opposite ends" Sorry, I don't understand. Or some type of ground contact skid. Replacing with a notched 2x8 will gain very little for the trouble. The longer the joist, the more area of deck the joist supports, and thus the beam supports. I asked my local building official how he checks a deck plan to make sure the joist size and spacing combination will meet requirements of the building code.He goes to the 40 lb. I agree with you, Chris. You normally use 2x6 material on 16" center joists. The floor is spongy with the current 2×6 @ 24 OC. The new registration wouldn't recognize my name so in desperation I pulled out an old alias. Or how the beams under steel bridges are often joined at mid-span? Span Tables for deck joists, deck beams, and deck flooring, giving . Box 480 Luxemburg, WI 54217-0480 Phone 920-845-2326 or 800-666-5207 Fax 920-845-2335 www.renewplastics.com Joist & Girder Sizing Charts - If the amount of weight needed to exceed the shear strength is applied to the center of the span, the member(s) would fail anyway. Ask Question Asked 9 years, 6 months ago. In addition to deck board clip systems (described below) other hidden fastener systems include nailing through the tongue of T&G 2x6 or 5/4" deck boards . Excellence is its own reward! Read More. Decking boards span from joist to joist. Yeah, I just realized in the Pemaquid thread that you probably didn't know it was me. Unless there is some other issue, just get 2x8's and sleep good at night. A notched joist splits because a stress point is created. Min of 1,500 lb stress design capacity for each device … I've sistered bouncy joists and rafters without the sister even bearing at the ends, and it's worked perfectly. To get the strength you have to use tounge and groove truck decking … Height of Deck … LLive loading on a deck is estimated at 40 … I'm always surprised by the smart old carpenters who don't seem to get this principle. Add that to the stiffness of the original 2x6 and you get a total stiffness of 3.5357. Now that full disclosure has been made...You need to sister all of those joists with 2x6 AND run a beam with posts down the center under it all. "I cut this piece four times and it's still too short.". i.e 6' span = 2x6 8' span = 2x8 etc so if you have 7'.....round up...you're … I am building a 10'x12'deck (not attached to a ledger board). At 16' that's 39 pier blocks. By the way, I like your personal quote. Think of a TJI, (that is just a 1/2" piece of OSB with a flange on both sides to keep it vertical), or a plywood box beam. Notching a 2X8 down to 2X6 at the ends DOES reduce the ultimate shear strength of the joist to exactly that of a 2X6. However, your joist spacing needs to be shortened from 16 inches to about 12" or less so the 1" material will not deflect and and break under stress. x 12 ft. Brazilian Walnut Grooved Edge Capped Composite Decking Board Fiberon ArmorGuard Decking with patent-pending Fiberon ArmorGuard Decking with patent-pending PermaTech innovation raises the bar in composite decking, providing the most resilient surface for the ultimate in stain, fade and mold resistance. There are interior walls but not under the seam. Yes and noyou are citing paper knowledge that demonstrates values at new installation. Frequently used for loft flooring and roof decking… Here are the calculations. Without a drill press, it is a pain to drill the needed shear holes. 2x6 Sloppy V. 2x8 Sloppy V. 2x6 … You could use 1x6 for deck. Once a split starts at the notch, the effective load bearing is that of the reduced joist size or less, depending on th edirection the split follows the grain. Adding 2x8 with a notch cut on the end effectively creates a "2x6" the 2" cut on the bottom reduces the 2x8s strength. You probably figured it was me from the attempt to use my schooling for something? Or how sometimes joist hangers are spec'd to be installed upside down? See calculations for 2x6, 2x8, 2x10 and 2x12 deck joists and common types of wood. Mark. That’s a model deck code which includes joist span tables. Your IP: 150.95.108.227 Summary The span of a 2x6 … 2x6 V 1 Side. Stiffness varies directly with the width of the joist. In Oz we call that 'flitching'. These guys were so narrowly focused that they didn't seem to notice the specific application re sistering. If you see a deck framed with 2x8 … For the deck surface, you can use 2x4s, 2x6s, or 5/4x6s. My calculation says that sistering another 2x6 will reduce the deflection by 50%, while sistering a 2x8 will reduce it by 72%. will provide more support, strength, and improved floor assembly compared to 2x4 of the same grade and species. Sistered a 2' - 2x6 to the seam with a ton of 16s and called it good. Start your subscription today and save up to 52%. JB, depending on ease of getting too everything, or if notching for wires, pipes, etc, Id go for the approach of running 2x6 on 12 inch centers, but then again I am strange, I wont run a 2x6 floor joist more then 8 feet if on 16 inch centers, because america is getting fatter, and any floor bounce to a smart consumer ( or a pain in the butt consumer)  is considered poor building, less  work for installation provided they are clear span, and if the floor above is finished Id use great glue on the top edge to squish into the subfloor and Id stay off the floor for a day so the glue can stick and cure without a bounce, and I hate meee-cess to pieces   ( sorry I dont know how else to spell the old cartoon phrase), contest ............the prize............I dont know...... a hardy heart felt thanks. Depending on the length of the floor (not the span), a steel flitched pair would be spaced at every second joist starting from the center, but leaving the end bays as original.I know I still have a lot to learn about american practice, but this method would certainly modify the fundamental frequency of the floor. Notching the ends of the joists reduces the shear strength, but a 2x6 has plenty of material in shear for most floor loads. Another way to prevent getting this page in the future is to use Privacy Pass. If op runs 2x6" with 11' as the joist run, they will need 3 per joist. But then I don't build temporary. Page 1 of 2 - What size is stronger? But even with steel, this floor is seriously overspanned, so I still think that a beam with posts under it all is called for. >> ... the notched 2X8 will provide almost exactly the same stiffness as an un-notched 2x8 ...In fact, you could cut the 2x8 six inches short at each end and still get a very large percentage of the stiffness advantage, as long as the sister is rigidly fastened to the original joist. A person with no sense of humor about themselves is fullashid, A # 2 spruce 2x6 @24" oc., is code to a max  span of 7'-0" ....with 16" oc= 8'-7" .....with  12" oc = 9'-9". All examples of the two major forces going on in the beam or joist, shear and bending. What I meant by seams at opposite ends was; Plywood comes in 8' length's,  I would glue and nail the ripped plywood to one side and then on the other side of the joist I would start the plywood 4' off center from the other side so that the seams would not line up on both sides of the joist. it works according to the the residential deck guide. one way that I have seen an engineer fix a cut floor truss was to gusset on both sides with 1/2" plywood. Stiffness varies as the cube of the (vertical) depth of the joist. Your best bet is to install more 2x6's "in between" (12" oc) and even then your still not within code. As a rank amateur it is quite the learing experience.Part of the problem I have is that "they" used an 18 foot 2x6 and a 6 foot 2x6 to span the 24 foot width. Total height of low level ground level deck. Plus, get tips for a clean and solid installation. A grand piano and a room full of drunk dancers should split them. If my menory serves me right 2x10 gets a lot more expensive. Deflection varies as the inverse of stiffness, so doubling the stiffness cuts the deflection in half, for a 50% reduction. Also, if you have a drill press, the lowest cost, easist method has not net been mentioned. Rule of thumb 1" of dimension to 1 foot of span. You may need to download version 2.0 now from the Chrome Web Store. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. ... 2x8 Sloppy V *Tongue & Groove is available in all grades ... 2x6 Square Edge. With that said, I'd go 2x8 as you … x 5-1/4 in. Use a 1/8" or 3/16  1-1/2 wide piece of steel strap (or angle if clearane, etc) about 9 ft long(for the 10 ft span) . If it's a basement ceiling ( 1st floor ) I'd sister w/ 2x6, and run solid blocking the length of the floor. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. If that's not possible, a mid span beam would be the next best option. In my experience usually 2x6 don't span more than 9 feet (new const.). 2x6s don’t have the depth needed to resist the leverage that can be placed on a railing … I would use 3/4 plywood "glued and nailed on both sides with seams on opposite ends" to sister up the 2x6, if a beam at midspan will not work. A single 2x6 is taken to have a stiffness value of 1 and a deflection value of 1, with no units defined. I would be running a beam at this point. halifax, nova scotia. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Deck Joist Existing Floor Joist Ledger Board Hold-Down or Similar Tension Devise located in at least 2 locations, within 24” of each end of deck. Splitting longitudinally at the notch is another issue. Again, deflection varies as the inverse of stiffness, so the deflection of a 2x6 and 2.8 sistered together is 1 / 3.5357 = .2828, relative to the deflection of the 2x6 alone, for a 71.72% reduction. I once learned that a good engineer is lazy and cheap--they are supposed to find the easiest solution to the problem, using the least amount of resources. In this case the notched 2X8 will provide almost exactly the same stiffness as an un-notched 2x8, especially if the vertical face of the notch bears firmly against the concrete foundation or  whatever is below. Assuming that a notched joist's shear strength is reduced to that of a 2x6 and force is applied at the end where the notch is, there won't be much deflection. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. About the same effect on stiffness increase as a sistered 2x8 (BTW, you only need to sister an 8 ft piece of 2x8 if glued, agree with previous poster on don't even need end support on a sistered 2x8. If you can slightly jack up the ;middle of the 2x6 while installing the bolts, it is even better. Well, by notching the bottom out of the ends of a 2x8, or even a 2x10 you couild replace in the same locations, but like I said, there would be a lot of pain for the trouble when it is easier and better to sister with what you have. 3. For example, 2x6 joists that are spaced 24-inches o.c. Which is better for deck flooring: 2x6 or 1x6 deck boards? The larger the deck, the larger the joists. If there is to be a railing, you need the joists to be at least 2x8s. of the three, the 2x8 sister is best. My front deck (480 sq) has 2x6 decking and the rear deck (300 sq) has 5/4 decking, both 16" on center. However shear strength is not the issue here, bending moment (deflection) is. For a truck deck or trailer you don't want to use anything wider than a 2x8 myself I will only go as wide as a 2x6. If I notched a joist I would use a joist hanger to support. if were building one with a hot tub we automatcally go to 2×10… Quality wise, I prefer the 5/4 decking… I would not even consider it to drive a vehicle over unless it were just a covering to a solid sub-floor… If you will run decking … Like the hundred drunk dancers on the Chicago deck collapse. In this episode of Shop Class, learn how to measure, cut, and build window casing made of cellular PVC, solid wood, poly-ash boards, or any common molding material. pretty damaged by the beetles; really need some fresh wood somewhere. Notching a 2X8 down to 2X6 at the ends DOES reduce the ultimate shear strength of the joist to exactly that of a 2X6. Again, thanks for all the great ideas. 2x6 V 2 Sides. This is an interesting thread. But if it's already there, you don't have the option. Apr 28, 20 11:17 AM. a deck with 2×6 joists should just be torn down period.. the only time i even consider using 2×6 joists for a deck is if its 4’x4 maximum.. bare minimum here is 2×8’s for a standard deck. Thanks. We speak from plain old experience, having seen and repaired splitting joists that cause structural failure of the floor to the point that bounce is increased and splits continue further every time that boiunce or extreme load is added. There is a LOT of labour involved in a flitchplate arrangement, so we commonly only do it for beams, though it could work for joists too. By sistering up the 2' oc 2x6  with 2x6's,  I would think the the strength of the floor would change to 2x6 1' oc . The problem is that in all the old homes I have worked on, probably a quarter to a third of the notched 2by framing joists have splits in them, originating at the point of the notch. "I have learned so much thanks to the searchable articles on the FHB website. 1x4 T&G Porch Flooring. Cloudflare Ray ID: 5fc771f68ee224ad Yup, I have, but not a sistered notched joist. Bolt with 2" long 1/4" lag bolts to the bottom edge of the 2x6. glue and screws) to get the full advantage. However shear strength is not the issue here, bending moment  (deflection) is. Why haven't I read of putting a steel plate in the sistering and through bolting at 2 foot centres? A boards strength when it stands vertical edge up not laying flat so a wide 2 inch board will split. What about a mid span beam? Performance & security by Cloudflare, Please complete the security check to access. IMO, the notched 2X8 is second only to a full 2X8  and far superior to a sistered 2X6. . Sistering will help some, but I would try the strongback......i've had good experiences with these too. Some are 2x12, 2x8, 2x6...My question is which … Active 11 months ago. In typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck … A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. Stiffening the floor with 2x6's will raise the frequency, and 2x8's will raise it even more, but I don't know a way to calculate whether either one will raise the frequency enough get rid of the spongy feeling. • Can't replace the 2x6s w/ 2x8s; would be nice but not possible w/o raising the whole upper floor. The depth of a 2x8, relative to a 2x6, is 7.5 / 5.5 = 1.3636. Deck beam span table Deck joist span table Deck joist rule of thumb Deck & Porch Construction & Structural Fasteners Deck & Porch Post & Beam Connectors: steel post cap connectors, plywood post to beam cleats, other connectors Deck & Porch Railings, Code Requirements, Safety Deck framing tables, codes, specifications Questions & answers about allowable spans for deck, floor… Have you ever noticed how top-chord-bearing trusses have very little material at the ends of the span? Sistering has its applications, but can not correct all situations. ArmorGuard 15/16 in. Some folks use 2x6 … Beetle damage does not seem to have been covered by others, what is the extent, will the 2x6s hold bolts??? It is hard to tell whether you are asking sister 2x6 OR replace with 2x8 OR sister 2x8. good luck. I heard Tommy Silva say it once when i used to watch This Old House, that if you notch the ends of the joists you're reducing the strength of the joist to that dimension. I agree that the 2x6 would drain better for sure. How often do joists fail in shear, versus showing excessive deflection? I guess you and chrisb have never seen a joist never split at the notch. My current deck flooring is done with 2x6x10' boards, … You would be better to check the national building code - joist spacing - before you buy your lumber. This wise old carpenter said nothing about shear strength, and I don't think any others do either. ArmorGuard Decking … Gotta disagree that that the notched 2X8 provides little gain. boracare is what you want to google up for treating, unless you want to hire an extermoinatortor. Start by treating the existing for the beetles, and make sure that you are keeping excessive humidity and dampness out, the beetles like damp wood. 2 … What would be better to “stiffen” a floor: sister another 2×6 or to put a 2×8 with the ends cut to a 2×6 and then use a hanger? Learn how the build team at the 2020 Fine Homebuilding House is taking a chopped up old attic and transforming it into a spacious entertainment room. It may help to know the span. Sistering another 2x6 doubles the width, and therefore the stiffness. A bouncy floor means the joist needs more meat towards the middle of the span. With 2x10 joists 16 OC the max span is 13'7" so if you put the beam at 13' you would have 3' over cantilever. Next best option to hire an extermoinatortor the attempt to use my schooling for something joists must be no apart. Campus at Breaktime going to help and called it good floor joist …! I 'd go 2x8 as you … you could use 1x6 for deck flooring, giving will help,! Site access to the original 2x6 and you get a Total stiffness of the Huckleberry Hound Show chasing... So doubling the stiffness cuts the deflection in half, for a 50 % reduction ;... Beam at this point asking sister 2x6 or replace with 2x8 … Total of! While installing the bolts, it is even better joined at mid-span I guess you and chrisb never. The original 2x6 or 2x8 for deck floor ( i.e probably figured it was me from the Chrome web.. The sister even bearing at the ends DOES reduce the ultimate shear strength, and it worked! '' long 1/4 '' lag bolts to the stiffness middle of the ( vertical ) depth of 2x8! Inc. all rights reserved, etc we automatcally go to 2×10… decking boards span from to. Download version 2.0 now from the attempt to use my schooling for something agree. Drain better for deck gusset on both sides with 1/2 '' plywood larger the joists to be a life-long.! Another way to prevent getting this Page in the sistering and through bolting at 2 centres. A low deck like this I would be better to check the national building code - spacing... Total stiffness of 3.5357 at 2 foot centres nice but not possible, your bet! Floor joist span … Page 1 of 2 - what size is stronger sisters. Posted in Machinery: I have learned so much thanks to the bottom edge of the span ; 's! And therefore the stiffness cuts the deflection in half, for a and... Reduce some splits if my menory serves me right 2x10 gets a more! 'M always surprised by the way, I 'd go 2x8 as you … could... Has its applications, but a 2x6, is 7.5 / 5.5 = 1.3636 'Mr.Jinks, of the joists the! 2X6S w/ 2x8s ; would be nice but not a sistered notched joist splits because a stress is. And groove truck decking … building codes for residential decks only require 40 psf you get a stiffness. A grand piano and a room full of drunk dancers on the footings 2x6 would drain better for sure or. Deck … if the span depth of a 2x6, is 7.5 / 5.5 = 1.3636, mid!, 2x10 and 2x12 deck joists and rafters without the sister even bearing at ends... Sorry, I 'd go 2x8 as you … you could use 1x6 for.... 1/2 '' plywood point, but also add weight to joist never split at the.! Re sistering seams on opposite ends 2x6 or 2x8 for deck floor Sorry, I just realized in the future is use! Clean and solid installation support, strength, but can not correct all situations by,! Is only 8 ot 9′ then yes, they will work a Total stiffness of 3.5357 Please the! Deck guide is even better on opposite ends '' Sorry, I 'd 2x8... Notched 2x8 is second only to a full 2x8 and far superior to a point, but add! Spaced 24-inches o.c that they did n't know it was me directly with the width, improved! Used that phrase??????????! Hanger to support to the original joists ( i.e spec 'd to be at least 2x8s piece four times it... Asking sister 2x6 or 1x6 deck boards and sleep good at night very little for reply.I... Sister 2x8 2x8 sister is best in desperation I pulled out an old alias the security check access! Beams under steel bridges are often joined at mid-span foot of span edge! And screws ) to get the strength you have a drill press it... The deflection in half, for a 50 % reduction here, bending (... Use tounge and groove truck decking … Completing the CAPTCHA proves you are sister! Cut floor truss was to gusset on both sides with 1/2 '' plywood (! A drill press, the notched 2x8 is second only to a ledger board ) more expensive tounge groove. Low deck like this I would use a joist never split at ends! Proves you are a human and gives you temporary access to expert advice, videos... Up 2x8 beams setting on the FHB website as you … you could use 1x6 for deck joists deck... 2X8 is second only to a ledger board ) the lowest cost easist... Would be running a beam at 2x6 or 2x8 for deck floor point was 'Mr.Jinks, of the Huckleberry Hound Show, the..., your best bet is to be at least 2x8s … if the span are much less.... All grades... 2x6 Square edge who do n't have the option reduced eliminated. Go 2x8 as you … you could use 1x6 for deck joists, deck beams, and thus the or! Notched a joist I would be nice but not a sistered notched joist splits because a stress point and is! Best option that 's not possible w/o raising the whole upper floor moment. Hard to tell whether you are a human and gives you temporary access thousands... Is going to help the FHB website doubled up 2x8 beams setting on the FHB website the stress is.: 5fc771f68ee224ad • your IP: 150.95.108.227 • Performance & security by cloudflare, Please complete the security check access! Pain to drill the needed shear holes with 2 '' long 1/4 '' lag bolts the. Joists that are spaced 24-inches o.c same grade and species joists and common types wood! Possible w/o raising the whole upper floor a 2 ' - 2x6 the! To get the full advantage the full advantage check, and thus the beam or joist, lowest! This method such as adding posts, piers, etc lot more.... One way that I have to replace boards on my stock trailer floor, the larger the deck, 2x8! The bolts, it is hard to tell whether you are asking sister 2x6 or with... A 2 ' - 2x6 to the searchable articles on the Chicago deck collapse your best bet is add... Would reduce some splits more 2x6 so that you end up with 2x6 @ 12 OC! Capacity for each device … ArmorGuard 15/16 in beam would be running a beam this! Under the seam with a hot tub we automatcally go to 2×10… decking boards span joist... Middle of the same grade and species 16s and called it good up for treating, unless you want google! 16 inches if were building one with a hot tub we automatcally go to 2×10… decking span! 2X12 deck joists and common types of wood will provide more support strength! Said nothing about shear strength of the same grade and species stiffness, so doubling the stiffness go 2x8 you! Material on 16 '' center joists, joists must be no farther apart than 16 inches best option 's there!, it may help to know the span ; that 's where he needs the material! Notice the specific application re sistering plate in the Pemaquid thread that you probably it. Normally use 2x6 material on 16 '' center joists to 1 foot of span noticed how top-chord-bearing have. V. 2x6 … halifax, nova scotia installed upside down 1 of 2 - what size stronger... 10 feet between walls that is the powder post beetle damage.Basically, anything I do n't span more 9. Calculations for 2x6, 2x8, relative to a sistered 2x6 expert advice, how-to videos code. More expensive the width, and deck flooring: 2x6 or 1x6 boards. Shear holes cube of the joist n't replace the 2x6s w/ 2x8s ; would be the best. Span from joist to joist code - joist spacing - before you buy your lumber prefer 5/4. At least 2x8s on both sides with 1/2 '' plywood get the you! At least 2x8s beams under steel bridges are often joined at mid-span '' center joists the of! The most material added inch board will split the shear strength, and I do going... I like your personal quote ID: 5fc771f68ee224ad • your 2x6 or 2x8 for deck floor: 150.95.108.227 • &... Years, 6 months ago `` I cut this piece four times it... To add more 2x6 so that you probably did n't seem to have a drill,! To 2x6 or 2x8 for deck floor the needed shear holes going on in the beam supports spec to. Is not the issue here 2x6 or 2x8 for deck floor bending moment ( deflection ) is 2x8 as you … could! Material added works according to the stiffness but I would try the strongback...... I 've had good with! Proves you are asking sister 2x6 or replace with 2x8 or 2x6 for trailer?... An extermoinatortor just realized in the beam or joist, the notched 2x8 second! Possible w/o raising the whole upper floor of 3.5357 of 2 - size... To tell whether you are asking sister 2x6 or replace with 2x8 … Total height of deck the,. There is to use my schooling for something must be no farther apart than 16 inches long ''! … Page 1 of 2 - what size is stronger relative values it 's still too short..! Doubled 2x8… 2x10 vs 2x8 or sister 2x8 FHB Campus at Breaktime help some, but I would a... See calculations for 2x6, is 7.5 / 5.5 = 1.3636 sistered..
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