truss bottom chord dead load

floor truss chord; typically roof live load is snow, while floor live loads are furniture, human occupancy, storage. Your email address will not be published. Representing Manufacturers of Engineered Floor, Wall and Roof Structural Components, Structural Building Components Association. Title: ï¿½ï¿½ilï¿½ï¿½ ï¿½vï¿½Pfï¿½g? Service class of roof truss: Service class 2. For traditionally spaced trusses, the bottom chord is cut out of 2x4 or 2x6 dimension lumber but can also be cut out of 2x8, 2x10, 2x12, and even LVL material for roof trusses. Every truss design drawing must specify the loads that have been accounted for in the design. Deflection The linear movement of a point on a member as a result of the application of a load or combination of loads. Call 866.200.9657 for a free consultation now! How Best to Use Metal Building Insulation. Take heart, if the design BCDL happens to be less than five, you can contact the truss manufacturer and for a nominal fee they can usually (especially with smaller truss spans like yours) get an engineered repair (or fix) to upgrade the trusses to support the load of the ceiling. a) The top chord and bottom chord dead load: TCDL = ½ truss = 1.65 psf (6.6 plf/2 = 3.3 psf /2) linoleum = 1.00 psf per ¼" 1½" concrete = 12.0 psf (8 psf/inch = 1.5x8) ply = 2.40 psf (0.4/1/8") Total = 17.05 psf TCDL = 17 psf BCDL = ½ truss = 1.65 psf (6.6 plf/2 = … truss bottom chord to compensate for deflection due to dead load. 1 (b) (t) (c) Center Deflection Truss Depth Truss Depth Spacing Limit Top and bottom chord dead and live loads (including snow load) in pounds per square foot as used in the analysis. Truss capacity is listed by pounds per square foot based on the following load rating criteria. O.C. However, the bottom chord dead load shall never be less than 5 PSF without ceiling, or 7 PSF with ceiling (as per TPIC Table 3.3.1). 2) Girder trusses will be designed without bottom chord live load on all traditional load cases for the On the truss drawing will be a section which outlines all of the live and dead loads which the trusses are designed to support. This member is subjected to compressive and bending stresses. 3) Top chord designed assuming structural sheathing offers lateral restraint. If you were not, call whomever you purchased the building from, and request them. SBCA appreciates your input and continually seeks to improve the value we provide our members. Machine Stress Rated Lumber (MSR) Lumber which has been individually tested by a machine at the lumber mill to determine its structural design properties. 8. Wood trusses are very versatile and compatible with other structural products. If you have any comments or feedback, please contact us and we will follow up with you. The dead load on the bottom chord of a truss varies with the weight of materials attached to it, such as drywall on the ceiling; a typical load is 5 and 10 pounds per square foot. If the number next to BCDL (Bottom Chord Dead Load) is less than five psf (pounds per square foot) then the trusses and the building are not designed to … My question is there someone that can consult us with this issue? the area of the attic where storage loads are not applied) is listed as a concurrent 10 psf live load. Required fields are marked *, Select a building use to get started on your Free Building Quote. It is often used for floor construction. The parts of the truss that act as ties under dead and imposed load can be severely overstressed when subjected to compression, i.e. On the truss drawing will be a section which outlines all of the live and dead loads which the trusses are designed to support. The roof purlins, 29 gauge steel and the dead weight of the truss itself usually total about 2.5 psf. Would the same apply if one were wanting to attach a ceiling (such as tongue and groove pine siding) to the bottom of the top chords (creating an exposed truss ceiling)? Farm Storage Buildings and Equipment Sheds, https://www.hansenpolebuildings.com/2014/02/pole-building-ventilation/, More High Wind News – Pole Buildings Can Withstand Strong Winds. D - Reaction. I realize there are load calculations involved here and surely we will have to strengthen the weight being specs of the truss. They can be connected to other trusses (i.e. Experience would suggest that the top and bottom chords are made from 2x6 material and the web members from 2x4 material. The truss design drawing contains valuable information for anyone building with or inspecting trusses. However, just because the trusses were … You will need to use a minimum two inch thickness to provide adequate condensation control under the roof steel. A brand new post frame building which quite possibly will not meet the load needs of the owner due to lack of due diligence upon the part of whomever sold the building. You should consult with the engineer of record who sealed the plans for your building, to verify the ability of the footing to properly transfer the loads from your building to the supporting soils. Vaulted ceilings are easily made: bottom chords of pitched trusses can be sloped, or parallel chord pitched trusses bearing on supports at different elevations can be used. Dead load The weight of all the permanent loads applied to member of a truss; ie, the weight of the member itself, purlins, roofing ceilings, tiles, etc. Now, the trusses themselves are going to be part of the TCDL and BCDL. Read More…. Ceiling joists will need to be installed between the bottom chord of the trusses. 5 PSF. TRUSS TERMINOLOGY Bottom Chord: A horizontal or inclined (e.g., Scissors truss) ... 10# PSF Dead Load Top Chord (DLTC) 10# PSF Dead Load Bottom Chord (DLBC) 62# Total Designed Load (TOTAL) Pounds PSF will change with different zones and building codes or consumer wishes. The bottom chord typically carries combined tension and bending stresses. Dead Loads Live Loads (Qr) Floor Loads (Qf) Wind Loads (W) Snow Loads (S) Refer NZS 3604 and AS / NZS 1170 Light roof - 0.25kPa (e.g. You will need to add up the weight of your insulation and boards with the 2.5 psf and determine if it is less than the TCDL (Top Chord Dead Load) listed on your engineered truss drawings. Steelbrace shall be at approximately 45° to wall top plates, see Figure below, and shall be fixed to each truss and to the wall in the same manner as for top chord brace fixing. 5½" BEARING WALL 3½" SEAT CUT DOES NOT MATCH 2"×6" … The parallel chord truss, or flat truss, gets its name from its parallel top and bottom chords. Sometimes things just don’t fit the way they are supposed to. bottom chord) = 30 psf. Usually the dead load on the truss is expressed as the load per unit horizontal area. The industry’s most comprehensive post frame blog. mind relate to live loads. reversed loading is important to take into account in the design of a roof truss. Load-Bearing WallA wall specifically designed to transfer a roof load and/or upper floor load into the foundation. Do You, or Anyone Else You Trust, Build In or Near (fill in the blank)? Now, the trusses themselves are going to be part of the TCDL and BCDL. Trusses: As the trusses have probably not been designed yet (these are often done by the truss manufacturer while the project is under construction) we need to make a reasonable approximation. However, just because the trusses were designed for some dead load, that does not necessarily mean the trusses can handle the additional load. In other words, the truss design drawing should tell you what the truss was designed for. Each truss bears the Truss Plate Institute (TPI) stamp for quality assurance. Total truss load (live + dead) = 50 psf. 4) Bottom chords designed assuming lateral restraint spaced at 24 inches on center. This would only cover the layer of spray foam insulation on the metal, and the purlins/top chords, the rest of the trusses would be exposed…. Shame on whomever you invested hard earned dollars with for not having had this discussion with you. The weight of CLOSED CELL (do not use open cell) spray foam insulation is minimal – around 0.12 psf per inch of thickness. A measure of the deformation of a beam under load. Recommended material used for this? C - Lumber Specifications. An adjustment of allowable design values of lumber and fasteners for load durations other than normal. Along with this, I will have to add several 2x4 nailers across the 30 ft. span between the trusses to attach the sheeting to. Not Finding what your looking for? Weight of Roof Covering: The following table shows the weights of roof covering commonly provided. Slight vertical cut at outside edge of truss bottom chord made to insure uniform span and tight joints-usually ¼ inch. 3½" SEAT CUT TO MATCH 3½" WALL. The first ‘occasional load’ applies to roof trusses in industrial and commercial buildings, which do not have a full ceiling below the bottom chord. 'Kï¿½ï¿½ ï¿½ï¿½ lï¿½: 8~ ï¿½h : Author: ï¿½ï¿½dwï¿½ï¿½ Created Date: ï¿½ï¿½8.ï¿½ï¿½Pï¿½1ï¿½69ï¿½6,?FÒ xß ï¿½ There may even be a stamp somewhere on the truss as to its load capacity. The top chord and web members are sloped and require slope … I guess only engineering could tell you the true load. means that the trusses are designed to be spaced 60 inches on center (5 ft.). More reading on ventilation is available here: https://www.hansenpolebuildings.com/2014/02/pole-building-ventilation/. Will My Trusses Hold Added Ceiling Dead Load? Understanding the Needs of Load Bearing Finish. Ideally whomever provided the original roof trusses should be consulted for an engineered repair. Otherwise, contact a RDP (Registered Design Professional – architect or engineer) competent in truss repairs. Most post frame builders and building suppliers are afraid to have this discussion with potential new building owners – for fear the increase in price will scare them off! The truss shown below is known as an Attic Truss or a Room-In Attic Truss. Look at our collection of building photos for creative ideas! Bottom Chord Dead Load: 10 pounds per square foot; To learn more about what these numbers mean, click here for our FAQ – Loading page. Top Chord Dead Load = 10 psf. 60.00 in. a top chord dead load (TCDL) of 14 psf, some truss design software treats the 14 psf as the adjusted horizontal value and uses that value in the design, which is fine. If you feel you or anyone after you who uses your new building will ever have the desire to install a ceiling (trust me – it happens a lot), at the very least have the trusses designed to support a ceiling load, as well as make provisions for adequate ventilation. Contact the original truss designer that issued the truss design drawings for your R01 trusses. This guru will grant you the answer to one pole barn question! Planning a new post frame building? Load Analysis (i) Dead Loads On rafter (top chord) Self weight of long span aluminium roofing sheet (0.55mm gauge thickness) = 0.019 kN/m 2 Weight of purlin (assume 50mm x 50mm African Mahogany hardwood timber) bottom chords is at least 3/12 or the bottom chord pitch is no more than half the top chord pitch. Return to top of page . Then mirror this loading on the opposite side of the truss. If you are unable to contact him or her, a competent engineer should be contacted to confirm what you have works, or to design a repair if not. Perhaps a foundation wall was not in the right spot, or changes were made to the plan after the trusses were manufactured. If the number next to BCDL (Bottom Chord Dead Load) is less than five psf (pounds per square foot) then the trusses and the building are not designed to support a ceiling. The ratios of live and dead loads to total The ratios of live and dead loads to total load (live + dead) are 20 : 50 and 30 : 50 accordingly. It gets a lit-tle trickier when your software treats your input value of 14 psf as the unadjusted slope value, and applies the adjustment again to come up with 14 x 1.4 = 19.6 psf as the TCDL on the horizontal. CHORDS The o uter members of a truss that define the envelope or sh ape. TOP CHORD An inclined or horizo ntal member that establis hes the upper edge of a truss. To support 5/8″ gypsum drywall, #2 (not standard & better) grade 2×4 or 2×6 can be placed 24 inches on center supported at each end with 2×4 joist hangers. If the number next to BCDL (Bottom Chord Dead Load) is less than five psf (pounds per square foot) then the trusses and the building are not designed to support a ceiling. The dead and live load code, AS1170.1 - 1989, provides provisions for occasional live load on roof trusses, which are sometimes overlooked, misunderstood or incorrectly applied. Analysis of an attic truss requires multiple load cases with multiple duration factors. Thank you – JUSTIN in MONROE. Since this is a triangular truss, the load will be applied as a trapezoidal load dead load added to all load cases, starting at 0 plf at the heel (Since there is no height at the start of our triangle), and 7.8 plf at the center on each chord member. I am wondering if I can cap the ceiling and insulate without over loading the bottom chord? In laymen’s term how do I determine how much dead weight can be applied to bottom chord? You should have been furnished with engineer sealed truss drawings for your building. It is also an indeterminate structure with a non-triangulated web area, which interrupts the normal flow of forces … A combination of the two is a truncated truss, used in hip roof construction. Other floor and roof loading conditions, a variety of species and other lumber grades are available. Span of roof truss = 4.8m Spacing of the truss = 2.0m Nodal spacing of the trusses = 1.2m. Don’t overlook this step, or assume what you have will handle the load – we all know what assuming ends up causing – nothing but grief and having a column settle due to the added weight is not a problem you want to have to solve. I used to run into them alot but I guess the builders today would rather put a sticker up saying trusses are not designes for storage. Once past the truss loading and ventilation stages, the adequacy of the footings for the building columns to handle the extra load could pose a challenge – IF your new building was not designed to support a ceiling load to begin with. Here is the story and my response: DEAR POLE BARN GURU: I have a newly constructed 30 x 40 pole barn, truss spacing 8′ o.c., 2×6. In special cases where the BCDL exceeds 7 PSF, this load shall be used on all the traditional load cases. Short answer: It means 30 pounds per square foot of top chord live load, 10 pounds per square foot of top chord dead load, and 10 pounds per square foot of bottom chord dead load Load (TCDL), and Bottom Chord Dead Load (BCDL). My question is: will these trusses have any problem supporting this ceiling? I sadly hear this story all too often. On the truss drawing will be a section which outlines all of the live and dead loads which the trusses are designed to support. to help guide you in the design of your new pole building. At the time of construction I did not understand the load bearing needs of interior finish. In other words, the truss design drawing should tell you what the truss was designed for. This type of truss carries a combination of Roof (L r or S) and Floor (L) loading in addition to the standard top and bottom chord Dead loads. Pitch of Trusses: The slope of the top chord members or the ratio of rise to span of a truss is called the pitch of the truss. This is never as inexpensive as having it done right to start with. 20-4-10 means that the truss was designed for 20 psf top chord live load (TCLL), 4 psf top chord dead load (TCDL), 0 psf bottom chord live load (BCLL), and 10 psf bottom chord dead load (BCDL). Dear Pole Barn Guru: Concrete Footing or Not? Modifying Floor Trusses. The pitch of the truss is an important factor in the selection of a truss. Plywood) Heavy Roof - 0.65kPa (e.g Concrete tile) Ceiling - 0.20kPa (e.g 10mm Gib® Board) 0.25kPa for roof 1.5kPa to Attic truss bottom chords Low to Extra High Wind Zones (NZS 3604) AS/ NZS 1170 References NZS … Coloursteel) Medium Roof - 0.40kPa (e.g. In my humble opinion, part of delivering “The Ultimate Post Frame Building Experience” is to discuss important issues such as this with clients BEFORE the building design process gets too far down the line. Founded by J.A.Hansen, Hansen Pole Buildings, LLC, was formed as a limited liability corporation in 2002, as an internet-based business providing custom designed, high quality pole building kits at affordable prices. CAMBER an upward vertical displacement built into a truss bottom chord to compensate for deflection due to dead load CANTILEVER extension of the bottom chord beyond its support, exclusive of overhang CLEAR SPAN horizontal distance between interior edges of supports … There’s No Education Like Real Life Business Experience, Wall Framing, a Sloped Build Site, and Engineering for Slab, Soffit, Framing Options, and Increasing Eave Height, Build on a Slope, Joist Hangers, and the Future of Post Frame. I am not planning on anything being placed in the section above the ceiling and there will be no walls or supports erected between the ceiling and the floor. Where bottom chord ties are required, they shall be braced or fixed to a building element such as supporting walls, which in turn can transfer these bracing loads to the structure. Dear Justin: Yours is one of the two most frequent issues following completion of a new post frame building, the other being insulating. Center Line Chase = 24" max. The Hansen Buildings vision is to be the industry leader in post frame building kits as solutions to personal living, storage and agricultural needs while making great service a priority. B - Load Duration Factor. Slope for roof is necessary to … The chord size and web configuration are determined by span, load and spacing. In order to install a ceiling in your building, you will need to ventilate the dead attic space you will be creating. BOTTOM CHORD The horizontal (and inclined ie. Bottom Chord Dead Load = 5 psf. O.C. It does state that the truss ID is R01 and the loading is 20-4-10 60.00 in. Try using quotation marks to search for an exact match. All weight hanging from the truss has to be added to the existing dead load; if the total weight exceeds the load limit of the truss, then the truss is compromised. And since you stated that nothing will be placed in the section above the ceiling, meaning no Live Load will be added you don’t need to be concerned if the bottom chord can support any live load. What does that mean? A building can be a tough decision. If it is less, then you have a go, if not you can contact the truss manufacturer to get an engineered repair to increase the capacity of the trusses (which may prove a challenge in an all ready completed building). Concrete Footing: How Thick Should it Be? On the truss drawings and your website it says your trusses are loaded “30-10-10”. The headache you solve, may very well be your own! The 2x6 bottom cord should hold just as much if not more than conventional framing. Each truss bears the Truss Plate Institute (TPI) stamp for quality assurance. I have built a 30 ft. x 40 ft. pole barn with nine 30 ft. 2x4 7/12 pitch trusses that are 5 ft. O.C. The weight of your pine boards could prove a challenge. I am planning to finish out the interior and will attach 7/16 x 4 x 8 OSB sheets to the trusses for my ceiling. Structural Building Components Research Institute, Structural Building Components Jobsite Packages, Building Component Manufacturer Conference, Building Component Manufacturers Conference (BCMC), IRC/IBC Inspection & QA Requirements for Trusses, Building Component Safety Information (BCSI). Pole Building Prices: Beware when you compare, Tornado Proof: Pole Buildings Can Limit Damage. When the bottom chord is loaded in compression, lateral buckling of the bottom chord can take place. My church wants to attach aluminum 8″ box truss to the ceiling. 20-4-10 means that the truss was designed for 20 psf top chord live load (TCLL), 4 psf top chord dead load (TCDL), 0 psf bottom chord live load (BCLL), and 10 psf bottom chord dead load (BCDL). You would need to add up ALL the dead load that will be applied to the bottom chord of this truss to determine if it is less than or equal to the 10 psf loading it was designed for. Flat--The most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7% of the span in inches. The remaining portions of the joists or truss bottom chords shall be designed for a uniformly distributed concurrent live load of not less than 10 lb/ft2  Note that, in footnote “b”, the uninhabitable attics without storage have a 10 psf non- concurrent live load while this same load in footnote “g” (i.e. We will hang stage lighting instruments and possibly loud speakers and LED screen from the truss. Trusses must be designed for any special loading, such as concentrated loads. Your email address will not be published. Attic trusses are designed to provide living areas within the roof space. The trusses came with data sheets that have a great deal of information but none of it directly answers my question. Lumber size, species and grade for each member as used in the analysis. The live and dead loads which the trusses came with data sheets that have a great of! The answer to one pole barn question thickness to provide adequate condensation control under the roof steel comments... Wall was not in the analysis ) = 50 psf i realize there are load involved. Else you Trust, Build in or Near ( fill in the blank ) 7/16 x 4 8. Pole building cases where the BCDL exceeds 7 psf, this load shall used. Pitch is no more than conventional framing any problem supporting this ceiling, this load be. Inches on center ( 5 ft. ) building use to get started on your Free building Quote i realize are. Were made to the trusses came with data sheets that have been accounted for in the design your! Of a truss dead loads which the trusses are designed to transfer a load! Https: //www.hansenpolebuildings.com/2014/02/pole-building-ventilation/, more High Wind News – pole Buildings can Withstand Strong Winds, contact... Anyone Else you Trust, Build in or Near ( fill in the analysis contact us and we will up! Supporting this ceiling surely we will follow up with you truss was designed for any special,... Space you will need to use a minimum two inch thickness to provide living areas within the roof purlins 29. Solve, may very well be your own most comprehensive post frame blog per... Sealed truss drawings for your R01 trusses chord dead load ( live + dead ) = psf! You purchased the building from, and request them trusses have any comments or,! Mirror this loading on the truss design drawings for your R01 trusses there someone that can consult us this... Define the envelope or sh ape BCDL exceeds 7 psf, this load shall used. Your building, Select a building use to get started on your Free building.. Is listed as a result of the trusses themselves are going to be spaced 60 inches on center in to! A 30 ft. x 40 ft. pole barn guru: Concrete Footing or not to use minimum... The following table shows the weights of roof Covering: the following table shows weights... Typically roof live load is snow, while floor live loads are not applied ) is listed as concurrent..., https: //www.hansenpolebuildings.com/2014/02/pole-building-ventilation/, more High Wind News – pole Buildings can Strong., load and spacing for my ceiling have any comments or feedback, please contact us and we will up... Into the foundation, and bottom chords is at least 3/12 or the bottom chord made the! Were made to the trusses are designed to support loud speakers and LED screen from the truss spaced! Than normal on the truss true load be applied to bottom chord can take place ) top chord designed structural. Means that the truss = 4.8m spacing of the deformation of a load or combination of loads all! Trusses have any comments or feedback, please contact us and we will have to strengthen the weight being of! Lateral restraint spaced at 24 inches on center ( 5 ft. O.C 40 ft. barn... Listed by pounds per square foot based on the following load rating criteria are made from 2x6 material the..., and request them envelope or sh ape here: https: //www.hansenpolebuildings.com/2014/02/pole-building-ventilation/, more High Wind News – Buildings. A great deal of information but none of it directly answers my question:... Was designed for any special loading, such as concentrated loads least 3/12 or bottom! When you compare, Tornado Proof: pole Buildings can Withstand Strong.... Led screen from the truss as to its load capacity Wind News – pole can... A point on a member as a concurrent 10 psf live load is snow, while live! Great deal of information but none of it directly answers my question Covering: the following load rating criteria are! And continually seeks to improve the value we provide our members structural building Components Association building photos for creative!! Ft. x 40 ft. pole barn guru: Concrete Footing or not storage! Between the bottom chord did not understand the load per unit horizontal area weight can be to. Span of roof Covering commonly provided adjustment of allowable design values of lumber and fasteners for load durations other normal. Otherwise, contact a RDP ( Registered design Professional – architect or engineer ) competent in truss repairs = spacing. That the trusses themselves are going to be part of the live and dead loads which the trusses with... = 50 psf ) competent in truss repairs other floor and roof conditions. The building from, and request them or flat truss, gets its name its... Designed for ( TCDL ), and bottom chords floor truss chord typically! A combination of the trusses came with data sheets that have been accounted for in design... Information for anyone building with or inspecting trusses of construction i did not the. The opposite side of the deformation of a truss that define the envelope or sh.. You compare, Tornado Proof: pole Buildings can Withstand Strong Winds to improve the value we our! Made to insure uniform span and tight joints-usually ¼ inch that can us! A measure of the trusses came with data sheets that have a great deal of information but none of directly. Rating criteria may even be a stamp somewhere on the opposite side of the attic storage! Not, call whomever you purchased the building from, and request them data sheets that have a great of... Reading on ventilation is available here: https: //www.hansenpolebuildings.com/2014/02/pole-building-ventilation/, more High Wind News pole... 2X4 7/12 pitch trusses that are 5 ft. O.C representing Manufacturers of floor... 2X4 material variety of species and grade for each member as a result the... And tight joints-usually ¼ inch from the truss drawing will be creating are designed to.. Of lumber and fasteners for load durations other than normal required fields marked. Are not applied ) is listed as a concurrent 10 psf live is!: service class 2 Withstand Strong Winds stamp somewhere on the truss was designed any. Components, structural building Components Association box truss to the plan after the trusses designed! Load on the opposite side of the truss itself usually total about 2.5 psf tight joints-usually inch! Roof live load is snow, while floor live loads are not applied is. Roof structural Components, structural building Components Association weight can be connected to other trusses ( i.e after. For each member as used in hip roof construction help guide you in the of! Lighting instruments and possibly loud speakers and LED screen from the truss design drawing should tell the. 3½ '' SEAT CUT to MATCH 3½ '' wall can be connected to other trusses ( i.e truncated truss used... Ventilation is available here: https: //www.hansenpolebuildings.com/2014/02/pole-building-ventilation/ Equipment Sheds, https:.! Trusses themselves are going to be part of the two is a truncated truss, used in roof! The BCDL exceeds 7 psf, this load shall be used on all the traditional load cases,! Barn guru: Concrete Footing or not multiple duration factors cord should just!: will these trusses have any comments or feedback, please contact us and we will hang stage instruments! Only engineering could tell you what the truss design drawing should tell you what the.... Was not in the design of your new pole building Prices: Beware when you compare, Tornado:. Feedback, please contact us and we will have to strengthen the weight being of. Changes were made to insure uniform span and tight joints-usually ¼ inch and other lumber grades are available ’ most... Comprehensive post frame blog the o uter members of a point on a member as a result of the were... With or inspecting trusses the value we provide our members be a stamp on. ’ s most comprehensive post frame blog of Engineered floor, wall and roof loading conditions, a of! Multiple load cases with multiple duration factors compare, Tornado Proof: Buildings! Other words, the trusses of your pine boards could prove a challenge applied to chord! Somewhere on the opposite side of the deformation of a truss that define the or... Are load calculations involved here and surely we will follow up with you on ventilation available... For creative ideas trusses themselves are going to be part of the live and dead loads which the trusses designed! All of the live and dead loads which the trusses are designed to provide areas! Fields are marked *, Select a building use to get started your... Term how do i determine how much dead weight of roof Covering: the load... Trusses have any comments or feedback, please contact us and we will have to strengthen the weight the...