CITY PROJECT - 1821 & 1823 E Chestnut Ave - Plan

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CITY OF SANTA ANA Planning and Building Agency n\Crcrrh.tc•uu•r �`�� ,, jAjn�nmyed TECHNICAL 13ULFi&*tNSSUANCE TB 82.1 Octobf r 2023(Expires 10?2024: This Joist® TJI$ Ceiling Joist Supporting Attic Load and Roof Th o"ad Date: The following information is intended to assist designers in the specification of TJI" for ceifingjoi t applications supporting both attic load and roof thrust load, as prescribed in 2015/2018/2021 IRC Chapter 8. it is the responsibilit of the designer of record to confirm the conditions of the ceiling joist to be within the limitations of the tables provided in this document. For additional design information regarding TAR' joists. reference Trus Joistg Tll ° Joist Specifier's Guide (TJ 40001. Ceiling Joists Supporting Attic Load and Roof Thrust Load Table 1 provides maximum clear spans for TJlx' ceiling joists supporting "uninhabitable attics with limited storage" or -areas other than sleeping areas" as defined by 2015/2018/2021 IRC Table R301.5 and a roof thrust load based on IRC prescribed connections between roof rafters and ceilingjoists. The nailing requirements for the rafter -to -ceiling joist connection are given by 2015 IRC Table R802.5.1(9), 2018 IRC Table R802.5.2. and 2021 IRC Table R802.5.2(1). Prior to fastening the rafter -to -ceiling joist connection, the TJIe joist must be reinforced to accommodate both the thrust load and tapered end cut (see Trus Joist' TJl6 Rafter Cut/Thrust Load Reinforcement Detail). For ceiling joists supporting only attic load, reference Trus Joist® TW11 Ceiling Joist Supporting Attic Load ITB-805). Design Live Load - 20 psi TABLE 1: TJI" CEILING JOIST SUPPORTING ATTIC LOAD AND ROOF THRUST LOADj11213141 f Design Dead Load = 12 psi Depth Tll' Maximum Clear Spanlsfl417181 20 PSF Live Load / 10 PSF Dead Load 40 PSF Live Load / 10 PSF Dead Load 12" o.c. 16" o.c. 19.Z'r o.c. 24" o.c. 12" o.c. 16" o.c. 19.2" o.c. 24" o.c. 110 22'-3" 20'-1" 18'-11" 17'-6" 17'-6" 15'-10" 14'-10" 13-8" 9%" 210 23'-6" 2V.3" 20'-0" 18' 6" 18' 6" 16'-8" 15'-8" 14' 5' 230 24'-4" 22'-0" 20'-8" 19' 1" 19' 1 17'-3" 16'-2" 14'-11 11' e" 110 26'.7" 24'-1" 22'-6" 20'-1" 20%11' 18'-11" 17'-5" 15'-6 210 28'-l" 25'-5" 23'-10' 22'-0" 22' 1" 19'-11" 18'-8" 17'-0" 230 360 29'-0' 26'-3" 24'-8' 22'-9" 22'-9" 20'-7" 19'-4" 17'-10" 30' 10" 27' 11" 26' 2" 24' 3" 24' 3" 21' 11" 20' 6" 18,111, 560 35'-6" 32'-l" 30'-2' 27'-1It' 27'-11" 25'-2" 23'-7' 21'-10" 110 30' 3" 26'-10" 24'-5" 21'-9" 23' 10" 20'-9" 18' 11" 16-10" 14" 210 31'-11" 28'-11" 26'-10' 23'41" 25'-1" 22'-9" 20'-9" 18'-6" 230 32'-11" 29'-10" 28'-0" 25'-3" 25'-11" 23'-5" 21'-11" 19'-6" 360 35'-0" 31'-9" 29'-9" 2T-7" 27' 7" 24'41" 23'-4" 21'-5" 560 36'-01' 36'-0" 34'-3" 31'8" 3l'-8' 28'-7' 26-10" 24'-9" 16" 110 33'-2" 28'-8" 26'-1" 23'-3" 25'-8" 22'-2" 20'-2" 18'-0" 210 35' 5" 31'-5" 28'-8" 25'-7" 27'-10" 24'-4" 22'-2" 19'-9" 230 36'-0"i9' 33'-l" 30'-3" 27'-0' 28'-9" 25'-8" 23'-5" 20'-10" 360 36- 011 35' 2" 33' 0" 30' 6" 30' 6" 27' 7" 25' 10" 21' 5" 560 1 36-Ong: 36'-Ongl 36'-0-91 35'-1" 35'-1' 31'-8" 29'-9" 11) uniform bads ony 121 Roof thrust bad calculater::.awd on 30 PSF roof Ine%snow load and 10 PSF dead load 131 Roof pitch 6:12 to 12:12. Maximum roof overhang is 24'. 14) Struts or posts supporting roof framing or purtm lines must not be braced to foists. 151 Simple span ony 161 Minimum beanng length of 2%,i' end. 171 Total load deflection limited to L/240 and live bad deflection limited to L/360; assumed no composite action. 181 For UP 110. maximum on center spacing of bracing is 32" o c : for all other U - Joists. use 36' o c. 191 Maximum clear span limited by scope of IRC table Page 1 of 2