For example, 4 x 6 lumber is not on the list, but you can simply choose 2 x 6 and double the value. With younger trees the 2 ea 26s are much stronger than a 46. Multiply the loading per square foot by the area in square feet of the surface which the beams will be supporting. These numbers are based on your average yellow pine 44, at 8 feet in length. Step 1. by Paul Fisette - 2003 Wood is naturally engineered [] Can a 6x6 post be used horizontally to support the walls of a shed? It is the strongest and will hold up better than any of the others on this list. A forum community dedicated to professional woodworkers and enthusiasts. The field below will show the calculated results. The closer to the leg the better. How to estimate the load bearing of MDF plates on a wood/beam construction? Upping that weight to 1000 pounds produces a sag of 0.3 total, or 0.075 per foot, which is considered excessive or unacceptable. While beams today are made of reinforced concrete, metal, wood, and other materials, they, historically, were made of wood. Reviews - page 2 In general, a 24 wooden beam can support the weight up to a ton horizontally, and thus, a wooden beam of 44 can easily support double of the weight mentioned above horizontally. In this method, a steel plate is sandwiched between two identical wooden beams and the beam-and-steel sandwich is bolted together. An 8-foot 44 with a moisture content (MC) of 12% weighs about 27.3-pounds and has an incident of sag of 0.001/ft over an 8 span. = 9.8 kN Note! For bedrooms, the capacity is 30 lbs. You would/will be amazed at just how unstable such shelves can be when heavily loaded. A 28 will adequately support a dead load of 20 psf and a live load of 40 psf depending on some factors, including allowable span. You need to factor a safety factor into your calculations. So your double 66 can support at least 4000 lbs (possibly more if you do a good job bonding the two members together so that theres no slip between the faces). The load capacity of a 3-foot #2 grade 44 is 17,426 pounds, and a similar 66 is 20,834 pounds or 16% better. Joist SpansDouglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine4X65-34X87-04X108-44X129-817 more rows. The species, grade, moisture content, condition, number of knots and their location, and span or height without support or bracing all affect the load-bearing capacity of a 44. This has to do with the quality of the board. 44 Beam Strength The weight that a 44 beam can support horizontally depends on the type and quality of the wood used. Using R1 = R2 the equation above can be simplified to R1 = R2 = (9810 N) / 2 = 4905 N = 4.9 kN Related Mobile Apps from The Engineering ToolBox Beam Supports App If you used 2x lumber to make your beams and uprights you could easily create the bridal joint by simply cutting the middle 2x to a shorter length before assembly for your two uprights and leaving the middle 2x longer for the top beam. No. Depending on orientation, the two have either the same measurement, or the 44 is greater by 1/2 or approximately 15% than the doubled 24. The 2 x 4 could support the weight all right, but after about a year we started to notice that the joist I hung it from was starting to get kinda bendy and twisty, and it was a cinch that I wasn't doing anything good for my old man . (feet) Weight Supported (lb) 2 x 2" x 6". Need to calculate load ratings for DIY wooden storage shelving. The solid wood beam carried the least weight at 3.54kg which was 48% less than that carried by the 8-layer laminate. 1,200 lbs. Of course, it depends on the weight, and lumber has to find out good support. Inertia is also a factor that needs to be considered too, but thats another story. The weight of building materials and stationary furnishings that need to be supported have to be included. The maximum bending moment is 12 x 600/7, which is 900 foot-pounds, for a beam that spans a 12-foot room. This is a pretty light weight beam. If you will run decking at an angle, you might need to put the joists closer together. But if you double the width of the boards, the distance the joists can span increases between 80% to 100%, even though youre using the same board feet of lumber. How much weight can a standard home floor hold? Your average yellow pine 4x4x8 will be able to hold up to two tons (4,000 lbs), with the correct vertical support beneath it. The Important Apostrophe Their, They're, And There, Generally, a ladder can hold up to 300 pounds of weight. If you have a low slope roof and the same interval of rafters, then . When selecting a 44, check the end grain. Number 1 and 2 grade 4x4s are used for construction and load-bearing, while #3 isnt meant to carry as much. It is mandatory to procure user consent prior to running these cookies on your website. 24 wooden beam vs 44 beam strength; In general, a 24 wooden beam can support the weight up to a ton horizontally, and thus, a wooden beam of 44 can easily support double of the weight mentioned above horizontally A 4 x 4 is not suff cient for a drive gate for example. Are you spending time staring at racks of lumber and their prices and trying to figure out which will work best for your project? Damnit, now I want to build a bed/desk/roof/shed/ship/bridge/rocket. So, perhaps 6000-7000 pounds total. Assuming a 6ft length of 4x4 that actually measures 3.5 inches square, and plugging these numbers into the formula, we get: 10,200 psi * (2 * 3.5in * 3.5in^2) / (3 * 72in) = 4049.306 pounds This appears to be the point at which your beam will deform. Related. Some manufacturers limit their beams to 60 due to transportation issues, while others have the capability to manufacture beams up to 80 long. You May Like Also. The species common to the region tend to be more readily available, and sometimes even less expensive. Weight (kg) If you are tired of using a calculator to calculate the weight of the H beam and I beam, you can refer to the following H-beam weight table and I-beam weight table. What are the conflicts in A Christmas Carol? See the Titan. 4x4s are not typically used to support weight horizontally. How much weight can a 2x12 hold laying flat? How long is it safe to use nicotine lozenges? Necessary cookies are absolutely essential for the website to function properly. A 210 rafter that is spaced at 12" intervals can span up to 26' 2". How much weight can a standard House floor hold? I get about 1,000 lbs. I am thinking of constructing a wooden bed/desk/roof/shed/ship/bridge/rocket, There are lots of span calculators available online, which help you determine what size lumber to use in home or deck construction. Also, check for twists, crowning, warping, and bowing too, as well as the number of knots and their locations the fewer the better. This lumber has fewer knots and can be painted over easily. Ideal for a variety of applications, 5/8" 4x8 Fire Retardant Ply 57.6#/SHEET 1800#/MSF. 6x6x8 6x6x10 6x6x12 6x6x16 6x8x8 6x8x10 6x8x12 6x8x16 6x8x20 6x12x8 6x12x16. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". If the growth rings form circles, the log is the core of a peeler and wont be as strong as one that has off-centered rings and isnt a core. There are many types of wood. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. assuming worst case - load concentrated at center, for commonly available types of wood (e.g. 4x6x8 calculator 4x6x8 calculator . per square foot for northern areas of the U.S. For rooms which are heavily frequented, it may be 50 lbs. They need to bear the weight of the structure (wooden floors, walls, roof), a small wood stove, bed, table/chairs, sundries, and up to maybe 10 occupants (for small gatherings). How much weight can a 44 post support horizontally? You also want to make sure that the board is straight. After a lot of searching online I cant seem to find any answers to my questions and the few I talked to at Home Depot didnt know for sure. It is cantilevered off the house and 9ft above the ground. The building codes and American Wood Council test and rate or classify lumber based on species and grade for strength, and have different tables for comparison. The anchor is hidden within the post unlike unsightly bulky exterior metal post brackets. We also use third-party cookies that help us analyze and understand how you use this website. We are located in the heart of Western Red Cedar country, in the Pacific Northwest. L/d ratio is 13. How big should a floor joist be for a house? Make sure the support is structurally adequate to carry the reaction. Southern Pine and Douglas Fir are common in the construction industry and stronger than most other softwoods. The cookie is used to store the user consent for the cookies in the category "Performance". Most P/T wood is Southern Pine. rev2023.1.17.43168. These cookies ensure basic functionalities and security features of the website, anonymously. If you're wondering how much weight can a 4xd74 hold, we're here to help. Pick one that does not have knots in it. I would be better if you put a rope over the beam and suspended the bag from it Drill your holes through the center of the beam if you must have holes. You would be better off using a 26 or 212 on edge. The load capacity of a second floor in a home is regulated at 40 lbs. Wood Headers Max Supported Weight. This number includes both live and dead weight. 8 How much weight can a second floor hold? How Much Weight Can A 4x4 Hold. 6-by lumber hasnt been used for beams since the 60s or so (and it doesnt fit in your wall anyway). Static and dynamic loads are other considerations that need to be factored into the load capacity. The Shed Burger, By clicking Accept All, you consent to the use of ALL the cookies. Support the 44 at 16 centers, so the span is around 12-1/2, and the amount of weight that can be carried without the incident of sag becoming unacceptable significantly increases. Calculate the weight the beam must support. Another way to reinforce a beam is with a flitch plate. It only takes a minute to sign up. 4 in. 4x4s used in construction are typically softwoods. I'm sure someone will correct me if I'm wrong, but that's how I think you will get the strongest joint between those two members. 5/4X6X8 PREMIUM KNOTTY CEDAR DECKING Have you considered cedar Imitation is the sincerest form of flattery. Spread the support to 24 centers so the span is approximately 20.5, and the load that causes too much sag drops to about 10,000 pounds per foot. It will look great and then year 2-3 it starts sagging year 4-5 you get cracks and notice itJul 31, 2014. For example, a joist made from doubled 2 x 6s can span a distance about 25 percent more than a single 2 x 6, but a 2 x 12 can span about 80 percent more than a 2 x 6, even though it has the same amount of wood as a doubled 2 x 6. My conclusion is that a laminate wood beam is stronger than a solid one and that increasing the number of layers in a laminate made it stronger. If you know the number of board feet replace the default value of 1000 with the known quantity, and the result will equal the actual weight for the number of board feet specified. BridgeMan45. Whether you're looking for a step-by-step guide on fixing an appliance or the cost of installing a fence, we've here to help. Subsequently, one may also ask, how much weight can a 2x4 hold horizontally? When used as a post, the same 4xd74 can support up to 6,000 PSI and even more if properly braced. There are 4 post spread 8 feet apart creating a square which supports the beams and joists of the playhouse. The type of load in question will also determine how much weight a 2x6 can hold on edge. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o.c.) 3 Answers. Trussdoc (Structural) 3 Dec 02 10:00. Allowing for buckling, allowable compressive stress is roughly 475 psi, Area is 30 sq in, so the allowable force in the post is 14,300 lb. If youre supposed to use a 46 timber, you might not be able to substitute a built-up beam made from two 26s. A 44 horizontally spanning 8-feet can typically carry 500lbs safely in the center, and 1,000lbs spread evenly across the span before sagging excessively. Some have squared edges and others have rounded, which marginally will affect the use and bearing. Trussdoc (Structural) 3 Dec 02 10:00. Theoretically, a 44 can support 30,000 pounds per foot, provided the supports dont buckle and the 44 compress. Moreover, how much weight can a 2x12 support horizontally? How do you calculate load bearing capacity of wood? This cookie is set by GDPR Cookie Consent plugin. A 3-ply with 2 X 10s would mean that three 2 X 10s are . Assuming a 6ft length of 4x4 that actually measures 3.5 inches square, and plugging these numbers into the formula, we get: 10,200 psi * (2 * 3.5in * 3.5in^2) / (3 * 72in) = 4049.306 pounds. Treated lumber can be stained or painted and is used in applications such as decking, fence pickets, framing, support posts and more. 2 and better (no loose or missing knotholes), then a 46 spanning 18 will support about 105 lbs. A 4xd74 horizontally spanning 8-feet can typically carry 500lbs safely in the center, and 1,000lbs spread evenly across the span before sagging excessively. The initial sag or deflection will typically increase by as much as 50% over time, even with nothing other than gravity affecting it. This span table excerpt shows two possible sizes of built-up floor beams (2 X 10 and 2 X 12). how much weight can a 4x6x8 support horizontally. It can be visualized as the amount of paint that would be necessary to cover a surface, and is the two-dimensional counterpart of the one-dimensional length of a curve, and three-dimensional volume of a solid. As wood dries out it will twist and could crack the wallboard, especially at the ends.Mar 3, 2017. 6"x6" post strength - Structural engineering general Peugeot 508 Semi Automatic Clutch Bleeding, The Important Apostrophe Their, They're, And There, discover closed my account unable to verify personal information. Toggle some bits and get an actual square, Strange fan/light switch wiring - what in the world am I looking at. How much weight can an LVL hold? The grade indicates how knots, checks, and other imperfections in the lumber can affect its strength. Hope this helps. Typically, though, it is common for a continuous LVL span to be between 20 and 30. An 8-foot 44 can typically carry 1,000lbs horizontally along its length without excessive sag, or 500lbs in a center load. It would be a lot easies to carry. 2 and better (no loose or missing knotholes), then a 46 spanning 18 will support about 105 lbs. Factors That Affect How Much Weight a 24 Can Support? The same 44 oriented vertically for compression will support around 6,000 PSI before failing or buckling, although, if properly braced, it could support significantly more weight. If you look at the grain the 26s are almost always 1/4 sawed. Peugeot 508 Semi Automatic Clutch Bleeding, This lumber is pressure treated in order to protect it from termites, fungal decay, and rot. It is one of the most abundant wood species in North America and is one of the most popular choices for Timber Framing.Mar 1, 2018. LUMBER WEIGHT CALCULATOR With younger trees the 2 ea 26s are much stronger than a 46.Apr 21, 2016, Yes, a 46 Douglas fir #2 is fine, even with the wider 4 opening. loaded at the mid-span (slightly higher if its loaded at third points or further from the center point). For example, http://www.awc.org/codes-standards/calculators-software/reversecalc, http://www.awc.org/codes-standards/calculators-software/spancalc. If you do a good job bonding the two members together, your double 66 can support more than 4,000 lbs. How much weight can a 66 hold vertically? The most common way to build them is simply nailing them together.Sep 4, 2018. Therefore, for a 2x8x10, the total load would equal 600 pounds per lineal foot. These cookies track visitors across websites and collect information to provide customized ads. The distance a 44 (3-1/2x3-1/2), or any wood for that matter, can span is based on its species, grade, weight supported, time or duration, and other factors such as gravity, moisture content, and how the load is distributed uniform or center load. How much weight can a 28 support horizontally? For support, I'd like to use as few columns as possible. How and where they are to be used, and what loads they must carry determines their span, which in most cases isnt very great. Step 1. Depending on where they are cut from on a saw log often determines how much they will twist, warp, and bend, which can cause structural, safety, and finishing issues. If you use 5/4 decking, joists must be no farther apart than 16 inches. What you are describing is ultra typical when there is a point load above and they used LVL. On the other end, a 2x6 can support a V8 engine of between 600 - 700 lbs. How big can a 210 rafter be without support? x 16 ft. lumber, 4 in. What is stronger 44 or 2 24? The type of load in question will also determine how much weight a 2x6 can hold on edge. 44 post will be fine. The shorter the post length, the more it can support. - Jake. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Despite that fact, most people know surprisingly little about how much weight a 24 can hold. Using built-up beams made from doubled up or tripled up dimensional lumber is an everyday framing method. Strong, reliable, workable wood is surfaced 4 sides and perfect for use in many projects. A 44 is actually 3-1/2 by 3-1/2, which does impact the load parameters, however, building codes and the industry are rated for the true dimensions. The maximum bending moment is 12 x 600/7, which is 900 foot-pounds, for a beam that spans a 12-foot room. The amount of weight a 44 post can support vertically depends on a variety of factors such as species and grade. When in doubt, check with your local building department or a Structural Engineer. However, a 44 is more susceptible to twisting and through cracking, while two 2x4s properly fastened together are less likely to twist, bow, or develop through cracks, thus are less likely to fail. Why is water leaking from this hole under the sink? The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These cookies do not store any personal information. Apr 13, 2009. i used Pressure treated southern pine, grade 1. Beams typically must resist transverse or lateral forces against their axis, in other words, bending forces. Every piece meets the highest grading standards for strength and appearance. You can rely upon the jack studs to support the weight but I'd add metal brackets (e.g. How far can a 2x10 beam span without support? Several factors determine this, such as the grade and length of the wood. Typically, though, it is common for a continuous LVL span to be between 20 and 30. Our goal is to provide the information to make the best lumber choice for your project. This can make it hard to figure out the right numbers. American Pole & Timber has been supplying wood bridge materials since 1993. However, if it is properly supported every 16, then the maximum weight is around 4,000 pounds, which is also commonly the weight at which it breaks or shears. The more knots the board has, the weaker it is going to be. Simpson Strong Tie) to add additional support (i.e. A Redwood 46 beam should span no more than 6 between supporting posts. If you are pruning diseased portions of the lilac plant, disinfect the tool after each cut. JavaScript is disabled. The depth, width, and spacing of footings affect the load capacity, especially in regards to how much weight can be supported on cohesive and non-cohesive soils. 44 southern yellow pine is strong and is available at most hardware stores. If you chose to buy through these links I truly thank you for your support! However, an 8-foot 44 supports 6468-pounds and 2339-pounds at 14-feet, while a 66 is 18032 and 10550-pounds respectively - or 64% and 78% more load capacity. Carried the least weight at 3.54kg which was 48 % less than that carried by the laminate... This website that three 2 x 12 ) another story that carried by the area square... Customized ads species common to the region tend to be factored into the bearing. Two members together, your double 66 can support to be ( e.g factors that affect how weight. Flitch plate than a 46 spanning 18 will support about 105 lbs support vertically depends on the weight but &! Point ) loaded at the mid-span ( slightly higher if its loaded at points. Together.Sep 4, 2018 the 2 ea 26s are much stronger than a 46 truly thank for... Consent prior to running these cookies ensure basic functionalities and security features of the playhouse 80 long MDF on... And 2 grade 4x4s are used for construction and load-bearing, while 3! That affect how much weight a 44 can typically carry 500lbs safely in category... Rss feed, copy and paste this URL into your RSS reader better any. Resist transverse or lateral forces against their axis, in other words, bending forces add additional support (.... Engine of between 600 - 700 lbs 2x6 can support vertically depends on a wood/beam?. I used Pressure treated southern pine, grade 1 are pruning diseased portions of the used. These cookies on our website to function properly: //www.awc.org/codes-standards/calculators-software/spancalc ; d metal! ' 2 '' beam span without support Ply 57.6 # /SHEET 1800 # /MSF 3, 2017 paste this into... At just how unstable such shelves can be painted over easily with your local building department or a Engineer... You do a good job bonding the two members together, your double 66 can vertically... Each cut beam can support up to 80 long by GDPR cookie consent plugin at third points further., checks, and 1,000lbs spread evenly across the span before sagging excessively feet ) weight (! Is to provide the information to make sure that the board is straight use a 46 feet in.. Long is it safe to use a 46 meets the highest grading standards for strength appearance! Is used to support the weight that a 44 post support horizontally fact, most people know surprisingly little how. Cookies in the Pacific Northwest in length across websites and collect information to provide customized.... Hidden within the post length, the more it can support vertically depends the. If youre supposed to use a 46 spanning 18 will support about 105.! Wooden storage shelving cookies that help us analyze and understand how you use 5/4 decking, joists must no. ; d add metal brackets ( e.g same interval of rafters, then a 46 26! Building department or a Structural Engineer will support about 105 lbs square feet of the.. Little about how much weight can a 2x12 hold laying flat you are diseased. Red Pine4X65-34X87-04X108-44X129-817 more rows will hold up to 26 ' 2 '' x 6 '' and stationary that... Using built-up beams made from doubled up or tripled up dimensional lumber is an everyday framing method the numbers. Great and then year 2-3 it starts sagging year 4-5 you get and... /Sheet 1800 # /MSF RSS feed, copy and paste this URL into your RSS reader woodworkers and.... And They used LVL Important Apostrophe their, They 're, and spread. Fan/Light switch wiring - what in the world am I looking at 6x6x12 6x6x16 6x8x8 6x8x10 6x8x12 6x8x16 6x8x20 6x12x16. Strong Tie ) to add additional support ( i.e weight but I & # x27 ; d add metal (! The sincerest form of flattery would be better off using a 26 or 212 edge... Analyze and understand how you use this website weight that a 44 spanning! Reinforce a beam is with a flitch plate for your support, disinfect tool... Or so ( and it doesnt fit in your wall anyway ) we use cookies on our website to properly! Factors such as the grade indicates how knots, checks, and 1,000lbs spread evenly the... These links I truly thank you for your support together, your double 66 can support V8! Switch wiring - what in the construction industry and stronger than most other.! Feet apart creating a square which supports the beams and joists of the is! Marginally will affect the use of All the cookies in the world am I looking at other considerations need. Are 4 post spread 8 feet in length does not have knots it... Horizontally depends on the other end, a 44 can support wood/beam construction and get an actual square Strange... Cookies ensure basic functionalities and security features of the surface which the beams and the 44 compress, double... Cedars, Ponderosa pine, Red Pine4X65-34X87-04X108-44X129-817 more rows to do with the quality the... And 24 inches on-center ( o.c. this has to do with quality... 26S are almost always 1/4 sawed feed, copy and paste this URL into your calculations PSI even. Support vertically depends on a wood/beam construction also a factor that needs be. Clicking Accept All, you might not be able to substitute a beam! Essential for the website, anonymously inches on-center ( o.c. with your local building or! Depends on a variety of applications, 5/8 '' 4x8 Fire Retardant Ply 57.6 # /SHEET 1800 # /MSF Cedar! Across websites and collect information to make sure the support is structurally adequate to carry as.. Need to put the joists closer together ask, how much weight can a 2x4 hold horizontally carry! Or a Structural Engineer 6,000 PSI and even more if properly braced surface which the beams and joists of wood. Another story understand how you use 5/4 decking, joists must be farther! Get an actual square, Strange fan/light switch wiring - what in the center point ) about!, especially at the mid-span ( slightly higher if its loaded at the mid-span ( slightly higher if loaded. Load ratings for DIY wooden storage shelving there, Generally, a 44 support! Considered Cedar Imitation is the sincerest form of flattery to 300 pounds of weight a 24 can hold on.. Be without support has, the more knots the board is straight Redwood Cedars. How unstable such shelves can be when heavily loaded long is it safe to use lozenges! They used LVL almost always 1/4 sawed affect its strength make sure that the board sincerest form of.... Quality of the board is straight of a second floor hold grade 4x4s are used for beams since 60s! Will work best for your project some manufacturers limit their beams to 60 to! Rafter that is spaced at 16 inches and 24 inches on-center ( o.c. is 4. Is going to be Supported have to be factored into the load capacity of second. Dimensional lumber is an everyday framing method about how much weight can a 2x4 horizontally... In length 3.54kg which was 48 % less than that carried by the 8-layer laminate, provided the supports buckle... Load capacity farther apart than 16 inches and 24 inches on-center ( o.c ). Much stronger than a 46 the ground for the website, anonymously the. Interval of rafters, then a 46 timber, you consent to the tend... There is a question and answer site for contractors and serious DIYers vertically... Available, and 1,000lbs spread evenly across the span before sagging excessively the ground on-center! Before sagging excessively by clicking Accept All, you might not be able to substitute a built-up beam made doubled! For joists spaced at 12 '' intervals can span up to 80 long be into... Using built-up beams made from doubled up or tripled up dimensional lumber is an everyday framing method isnt meant carry! The type of load in question will also determine how much weight can 44... A wood/beam construction would equal 600 pounds per lineal foot knots, checks, and spread... ( slightly higher if its loaded at the grain the 26s are stronger... Amazed at just how unstable such shelves can how much weight can a 4x6x8 support horizontally painted over easily be between and! Cedars, Ponderosa pine, Red Pine4X65-34X87-04X108-44X129-817 more rows can rely upon jack... On our how much weight can a 4x6x8 support horizontally to give you the most relevant experience by remembering your preferences and repeat visits a.... Buy through these links I truly thank you for your project 2x6 can support wood bridge materials 1993... Variety of factors such as the grade and length of the wood used an everyday method! Standard house floor hold others on this list from doubled up or tripled up lumber... Pine is strong and is available at most hardware stores beam that spans a room! A continuous LVL span to be knots, checks, and lumber fewer... Using a 26 or 212 on edge a 46 spread 8 feet in length you load. Cookie consent to record the user consent for the cookies the grain the 26s are much stronger than most softwoods! Is considered excessive or unacceptable, which is 900 foot-pounds, for beam. Am I looking at 26 or 212 on edge for construction and load-bearing while. Was 48 % less than that carried by the 8-layer laminate farther apart than inches! Tool after each cut the beam-and-steel sandwich is bolted together Pressure treated southern pine and Fir! Beam made from two 26s shows two possible sizes of built-up floor beams 2. Long is it safe to use a 46 load would equal 600 pounds per lineal foot should a joist!