[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-648340-105":59,"doc-detail-648340-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","technical-notes-19b-residential-chimneys-design-and-construction","Technical Notes 19B-Residential Chimneys-Design and Construction","","All residential chimneys, serving both fireplaces and appliances, are designed and constructed to provide fire protection and safely convey combustion by-products outdoors. Effective performance depends on design choices, material selection, construction practices, and applicable building-code requirements. Chimney height and flue area are identified as two of the most critical factors. The document outlines design approaches, code dimensions, clearances, sealing, and material specifications for durable masonry chimney systems.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/technical-notes-19b-residential-chimneys-design-and-construction/648340/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/technical-notes-19b-residential-chimneys-design-and-construction/648340.png","ImageObject",300,407,{"name":92,"@type":93},"BigDaveOnline","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-27","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the primary functions of residential chimneys?","Question",{"text":112,"@type":113},"Residential chimneys must provide fire protection and safely convey combustion by-products to the exterior of the structure. They must discharge these by-products at a rate that does not adversely affect the combustion process.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does flue slope affect chimney design?",{"text":117,"@type":113},"Flues may slope to join other flues or to achieve the desired chimney location. The maximum allowable slope is 30 degrees from vertical.",{"name":119,"@type":110,"acceptedAnswer":120},"What key building-code requirements are given for chimney construction?",{"text":121,"@type":113},"The notes specify wall thickness guidance, rules on where the chimney or liner may change dimensions, minimum chimney height for fire safety, minimum clearances to combustibles, firestopping requirements, and sealing of exterior spaces with flashing and caulking.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},648340,1793115142,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":36},962090896214,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Technical Notes 19B-Residential Chimneys-Design and Construction  \nRev [June 1980] (Reissued Apr. 1998)  \nAbstract: All residential chimneys. both for fireplaces and appliances, are designed and constructed to serve the same basic functions. They must provide fire protection and safely convey combustion by-products to the exterior of the structure at a rate that does not adversely affect the combustion process. Design, materials selection, construction, and building code requirements all have a significant impact on the chimney's potential to fulfill these functions. Chimney height and flue area are the two most critical factors in chimney desire.  \nKey Words: bricks, building codes, chimneys, draft, flashing, flues, masonry, mortar.  \nINTRODUCTION  \nThis Technical Notes addresses the design and construction of residential chimneys. Other Technical Notes in this Series deal with residential fireplaces and commercial chimneys. The design of residential chimneys is empirical and based on successful prototypes. The function of residential chimneys is to allow combustion byproducts to be conducted away from the structure safely.  \nGENERAL  \nResidential chimneys generally fall into two categories: 1) chimneys serving fireplaces, and 2) chimneys serving appliances. While there are dissimilarities between the two types, they both serve the same basic functions. It is worthwhile, therefore, to consider their similarities. Both are constructed of similar materials and must meet the same building code requirements. Even though they may convey different combustion by-products at different velocities, they both must be designed and constructed to discharge these by-products at a rate that does not adversely affect the combustion process and to release the discharged material at a height and location that provides fire safety.  \nFlues may slope to join with other flues so as to discharge through a common flue, or to achieve the desired location of the chimney. The maximum allowable slope is 30 deg from vertical. When combining flues the main discharge flue should be sized for the maximum combined flow from the smaller flues. Combining flues of dissimilar systems or fuels. i.e. , appliances and fireplaces, is not allowed by many building codes. Separate flues may be incorporated into one chimney so long as minimum wall thickness requirements are met and a full wythe of brick is laid between them and bonded to the chimney walls.  \nBuilding Code Requirements  \nBuilding code requirements for chimneys may vary on a local basis. There are, however, several that are accepted nearly everywhere. They include:  \n1. Chimney wall thickness should be a nominal 4 in. (100 mm) unless no flue liner is used, in which case a nominal 8 in. (200 mm) is required.  \n2. Neither chimney nor flue liner may change size or shape within 6 in. (150 mm) of either floor components, ceiling components or rafters.  \n3. The minimum chimney height for fire safety is the greater of 3 ft (1 .0 m) above the highest point where the chimney penetrates the roofline, or 2 ft (600 mm) higher than any portion of the structure or adjoining structures within 10 ft (3 .0 m) of the chimney, see Fig. 1.  \n4. Chimney clearance from combustible material is a minimum of 2 in. (50 mm) except where the chimney is located entirely outside the structure, in which case 1 in. (25 mm) is acceptable.  \n5. The spaces between a chimney and combustible material should be firestopped using a minimum of 1-in. (25 mm) thick noncombustible material.  \n6. All exterior spaces between the chimney and adjacent components should be sealed. This is most commonly accomplished by flashing and caulking.  \n7. Masonry chimneys should not be corbeled more than 6 in. (150 mm) from a wall or foundation nor should a chimney be corbeled from a wall or foundation which is less than 12 in. (300 mm) in thickness unless it projects equally on each side of the wall, except that on the second story of two-story dwellings corbe","cbCaid5BOEa4x56M","https://ap.wps.com/l/cbCaid5BOEa4x56M","pdf",280669,16,"English","# Introduction\n# General\n# Flues and Discharge Configuration\n# Building Code Requirements\n# Building Code Dimension Requirements\n# Recommendations\n# Chimney Used as Structural Support\n# Materials\n## Brick\n## Mortar","[{\"question\":\"What are the primary functions of residential chimneys?\",\"answer\":\"Residential chimneys must provide fire protection and safely convey combustion by-products to the exterior of the structure. They must discharge these by-products at a rate that does not adversely affect the combustion process.\"},{\"question\":\"How does flue slope affect chimney design?\",\"answer\":\"Flues may slope to join other flues or to achieve the desired chimney location. The maximum allowable slope is 30 degrees from vertical.\"},{\"question\":\"What key building-code requirements are given for chimney construction?\",\"answer\":\"The notes specify wall thickness guidance, rules on where the chimney or liner may change dimensions, minimum chimney height for fire safety, minimum clearances to combustibles, firestopping requirements, and sealing of exterior spaces with flashing and caulking.\"}]","Technical Notes 19B-Residential Chimneys-Design and Construction | PDF",1792793165]