ASHRAE 90 1 MB304 Therm All

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H O W T O U S E T H I S G U I D E, This guide contains typical metal building insulation system constructions and their associated U values when. different thicknesses of insulation are used Pages 4 6 These insulation system constructions are listed by geo. graphical region Table 4 pages 8 9 For ASHRAE 90 1 compliance the systems used in the construction of a. metal building must be at or below the U Values given in Table 4 for the appropriate geographic region. To use the information in this guide first find out which version of the Standard applies in your area. ASHRAE 90 1 89 or ASHRAE 90 1 1999 2001 We will be referring to the 2001 version However if the. 1999 or 2000 version is in place the same information applies The ASHRAE 90 1 Standard covers all com. mercial metal buildings that are heated and or cooled It does not apply to buildings that a do not use. electricity natural gas propane or oil and b are used primarily for manufacturing or commercial processes. Check with the authority having jurisdiction in your area Then follow the relevant section below. See page 7 for NAIMA s insulation recommendations for metal buildings not subject to ASHRAE 90 1 requirements. If ASHRAE 90 1 89 is the required If ASHRAE 90 1 1999 2001 is the. energy code required energy code,1 Determine the U value requirements for the. roof ceiling and opaque walls from Table 4,pages 8 9 ASHRAE 90 1 89 Section based on. 1 Determine what type of metal building is being,constructed Buildings that are heated or cooled. for human occupancy use the Non Residential cri, the nearest city with similar climate conditions teria column Buildings that have a heating system.
that is rated at 3 4 Btu h ft2 or less use the Semi. 2 Turn to pages 4 6 and compare the systems,and the required U values Look for the sys. tem which lists a U value at or below the, Heated criteria Semi heated buildings are generally. ones that have a small heating system designed to,prevent freezing of the building s contents. required U value needed to meet the code,An Example for Birmingham Alabama. Table 4 lists the following U value compliance,2 Determine the U value requirements for the.
roof ceiling and opaque walls from Table 4,pages 8 9 ASHRAE 90 1 2001 Section based on. requirements for Birmingham Alabama the nearest city with similar climate conditions. Roof Ceilings 0 069 Opaque Walls 0 147,For roof ceilings System 2 Single Layer R 19. 3 Turn to pages 4 6 and compare the systems,and the required U values Look for the sys. tem which lists a U value at or below the,insulation will give a U value of 0 65. required U value needed to meet the code,For sidewalls System 1 R 10 insulation will give.
a U value of 134 for 12 fastener spacing and a An Example for Atlanta Georgia. U value of 139 for 6 fastener spacing Non Residential Building. Table 4 lists the following U value compliance,requirements for Atlanta Georgia. ASHRAE 90 1 2001 ASHRAE 90 1 89, Non Residential Semi Heated Roof Ceilings 0 065 Opaque Walls 0 113. Unconditioned Space,Walls Adjacent to,Roofs Ceilings. Roofs Ceilings,Roofs Ceilings,Opaque Walls,Opaque Walls. Opaque Walls,For roof ceilings System 2 Single Layer R 19.
insulation will give a U value of 0 65,City State,For sidewalls System 1 R 13 insulation will give. Birmingham FAA AP 0 065 0 113 0 097 0 184 0 147 0 069 0 230 a U value of 113 for 12 fastener spacing and a. Mobile WSO AP 0 065 0 113 0 167 0 184 0 226 0 076 0 376. Montgomery WSO AP 0 065 0 113 0 167 0 184 0 175 0 070 0 279 U value of 118 for 6 fastener spacing. ASHRAE 90 1 2001 ASHRAE 90 1 89,Non Residential Semi Heated. Unconditioned Space,Walls Adjacent to,Roofs Ceilings. Roofs Ceilings,Roofs Ceilings,Opaque Walls,Opaque Walls. Opaque Walls,City State, Atlanta WSO AP 0 065 0 113 0 097 0 184 0 141 0 072 0 219.
Augusta WSO AP 0 065 0 113 0 167 0 184 0 159 0 070 0 251. Macon WSO AP 0 065 0 113 0 167 0 184 0 171 0 070 0 272. Savannah WSO AP 0 065 0 113 0 167 0 184 0 193 0 075 0 313. ASHRAE 90 1 COMPLIANCE FOR METAL BUILDINGS,BACKGROUND INFORMATION. SHRAE 90 1 1989 and 2001 titled,Energy Efficient Design of New Buildings. Except Low Rise Residential Buildings,published by the American Society of. Heating Refrigerating and Air Conditioning Engineers. Inc is the latest of the Standard 90 series This stan. dard sets forth design requirements for the efficient. use of energy in new buildings intended for human, occupancy except single and multi family residential. buildings of three or fewer stories above grade, The Standard applies to metal buildings that include.
the following building is intended for warehousing products not. sensitive to extreme heat or cold and human comfort. provisions for a space heating system, is not a factor then the Standard does not apply In. provisions for a space cooling system, most areas 90 1 has been adopted as the commercial. provisions for a service water heating system,building energy code Check with the authority hav. In other words almost all metal buildings are subject ing jurisdiction in your area to verify the applicable. to meeting the requirements of ASHRAE 90 1 commercial building energy code requirements. WHEN ASHRAE STANDARD 90 1 ADDITIONAL REASONS TO COMPLY. DOES NOT APPLY WITH ASHRAE 90 1, ASHRAE Standard 90 1 does not apply in the follow The Standard sets minimum requirements for the. ing building situations energy efficient design of new buildings in a manner. that minimizes the use of energy without constrain. areas of the building intended primarily for manu, ing the function or the comfort of the buildings It.
facturing commercial or industrial processing,is intended for buildings designed for human occu. buildings where the combined peak design of,pancy whether it be now or in the future. energy usage is less than 3 5 Btu hr sf,buildings of fewer than 100 square feet of gross. A building intended for a manufacturing or industri. floor area,al processing plant today may be remodeled into a. The defining factor is whether or not the buildings are structure requiring office space or even warehouse. to be heated or cooled for human occupancy or used space for temperature sensitive products tomorrow. for products or processes that are temperature sensi Generally the cost to retrofit a building to meet. tive For example if the metal building used for a fac ASHRAE 90 1 requirements can be more costly than. tory and a temperature needs to be maintained for building in the recommended energy efficiency. employee comfort the ASHRAE 90 1 applies If the measures a the time of construction. NAIMA 202 96 Rev 2000 Today s Designers Are More Energy Conscious. Insulation Helps Builders Many metal building designers and building owners. Meet ASHRAE 90 1, are designing energy efficiency into their structures.
Insulation is perhaps one of the most cost at the onset An energy efficient building provides. effective ways to meet the energy code greater flexibility in its use and generally will be. Furthermore it provides additional benefits more marketable for resale. such as energy savings condensation control,noise control and enhanced light reflectivity. that will remain with the building over the life ASHRAE 90 1 OFFERS. of the structure THREE COMPLIANCE PATHS, Builders and designers are using NAIMA The Standard offers multiple paths by which com. 202 96 Rev 2000 fiber glass metal building,pliance can be determined This allows the design. insulation because it requires no new invest er to follow Prescriptive Criteria System. ment in technology resources or time It is a Performance Criteria or a Building Energy Cost. technology that makes code compliance easier Budget Method to reach a compliant design The. To assure builders they are getting the right Prescriptive Method requires the minimum design. R value delivered to the job site NAIMA effort while the latter two methods allows for more. 202 96 Rev 2000 insulation is purposely,innovative design flexibility. designed by the manufacturer to assure that, thickness recovery and R value are still intact ASHRAE Standard 90 1 is rapidly being adopted by.
after the laminating process NAIMA metal model state and local energy code making bodies. building insulation products are tested quarter Requests have been made to the NAIMA Metal. ly by NAHB Research Center and are certified Building Insulation Committee to provide further. to meet stringent thermal resistance require information on the use of the Prescriptive Criteria. ments These fiber glass insulation products with regard to metal building insulation systems. intended for metal buildings will have the This provides easy to use information tailored specif. manufacturer s name NAIMA 202 96 Rev, ically to the unique nature of metal building insula. 2000 and the R value printed on the surface tion systems For more sophisticated designs where. for easy identification on the project site trade offs are to be considered one of the other. design paths is recommended,CITY DIRECTORIES OF,ASHRAE 90 1 U VALUE. REQUIREMENTS,Overall U values for various building envelope. requirements were tabulated in Table 4 for 183 cities. using the climate data listed in Appendix C of,ASHRAE 90 1 1989 and Appendix D of ASHRAE. For additional cities not listed in Table 4 refer to the. appropriate version of ASHRAE 90 1 to determine,the envelope U value requirements.
Typical Assemblies and Their Associated U values,he following illustrations show typical. metal building systems constructions and,their associated U values when different. thicknesses of insulation are used,Deviations from this information should only be. made when specific test data from valid hot box,assembly tests can be provided. About the Calculations, Previous versions of this brochure entitled ASHRAE 90 1.
Compliance for Metal Buildings provided insulation sys. tem illustrations and a U value chart based on the Zone. Method of Calculation described in the ASHRAE,Handbook of Fundamentals While the Zone Method is. still referenced in the Handbook its simplified two. dimensional analysis does not accurately portray the. complexities of a metal building insulation system System Assumptions for FEA Calculations. 1 The U values displayed apply to both bar joist and. The calculations and the U values portrayed on the purlin applications. following pages more accurately reflect the multi 2 U values include air film coefficients. dimensional systems seen in the field They are cal 3 In the systems where thermal spacer blocks are. culated using the entire metal building system recommended the FEA models used 3 wide. including purlins clips fasteners and the insulation spacer blocks made from 1 extruded poly. Each system shown was modeled using the ANSYS styrene foam. Finite Element Analysis FEA software program The 4 All calculations were made based on 75 F mean. FEA program breaks the systems down into small temperature using NAIMA 202 96 Rev 2000. pieces that are called elements The elements are fiber glass metal building insulation. related to each other through a large matrix of equa 5 Vapor retarders were always installed toward the. tions based on the physical properties of the various conditioned space. materials in the system Solution of these equations 6 In multi layer systems such as System 2B and. yields a detailed picture of the temperature distribu System 3 NAIMA 202 96 Rev 2000 was used for. tion and heat flow in the system both layers The model made the calculations. based on placement of the faced first layer, To verify the accuracy of the modeling technique towards the conditioned space and a second. the results for several insulation configurations were unfaced layer installed towards the roof sheet. compared to available hot box testing results Once This thicker or in most cases top layer will. the modeling technique was verified it was applied therefore have a greater R value than the thinner. to a large number of insulation configurations faced insulation. System 1 Screw Down Roofs Side Walls, Screw Down Roof Or Wall TABLE 1a SCREW DOWN ROOFS 5 purlin spacing. System With Single Layer,U VALUE U VALUE, Insulation Installed Over NAIMA 202 96 Rev 2000 SCREW DOWN ROOF SCREW DOWN ROOF. R VALUE 12 Fastener Spacing 6 Fastener Spacing,Purlins Girts 10 153 160.
In this system NAIMA 202 96 11 139 147,13 130 137,Rev 2000 fiber glass metal. 19 098 106,building insulation is installed,over and perpendicular to the. purlins girts and the metal exte TABLE 1b SIDE WALLS 7 girt spacing. rior roof or wall sheets are fas,U VALUE U VALUE, tened to the purlins girts hold NAIMA 202 96 Rev 2000 SCREW DOWN WALL SCREW DOWN WALL. R VALUE 12 Fastener Spacing 6 Fastener Spacing,ing the insulation in place 10 134 139. 11 123 129,13 113 118,19 084 090, Note The lower the U value the better the performance.
NAIMA 202 96 Rev 2000,Insulation,Vapor Retarder,NAIMA 202 96 Rev 2000 Insulation. System 2 Standing Seam Roof only, Standing Seam Roof With TABLE 2a STANDING SEAM TABLE 2b STANDING SEAM. Single Or Double Layers Of ROOF SINGLE LAYER ROOF DOUBLE LAYER. Insulation Installed Over And 5 purlin spacing 24 o c clip spacing 5 purlin spacing 24 o c clip spacing. For ASHRAE 90 1 compliance the systems used in the construction of a metal building must be at or below the U Values given in Table 4 for the appropriate geographic region To use the information in this guide first find out which version of the Standard applies in your area ASHRAE 90 1 89 or ASHRAE 90 1 1999 2001 We will be referring to the 2001 version However if the 1999 or 2000

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