SJI Standard Specifications by New Millennium Building Systems

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Featured catalog pages of SJI Standard Specifications

introduction sji standard specifications ­ k-series american national standard sji-k-2010 american national standard sji-k-2010 astm a572/a572m-07 standard specification for high-strength low-alloy columbium-vanadium structural steel astm a588/a588m-05 standard specification for high-strength low-alloy structural steel up to 50 ksi [345 mpa minimum yield point with atmoshperic corrosion resistance astm a606/a606m-09 standard specification for steel sheet and strip high-strength low-alloy hot-rolled and cold-rolled with improved atmospheric corrosion resistance astm a992/a992m-06a standard specification for structural steel shapes astm a1008/a1008m-09 standard specification for steel sheet cold-rolled carbon structural high-strength low-alloy and high-strength low-alloy with improved formability solution hardened and bake hardenable astm a1011/a1011m-09a standard specification for steel sheet and strip hot-rolled carbon structural highstrength low-alloy high-strength low-alloy with

introduction sji standard specifications ­ k-series american national standard sji-k-2010 american national standard sji-k-2010 table 4.3-1 maximum and effective slenderness ratios description i k/rx k/ry k/rz ks/rz general joist information economical design guide top chord interior panels a the slenderness ratios 1.0/r and 1.0s/r of members as a whole or any component part shall not exceed 90 b the effective slenderness ratio k/r to determine fcr where k is 1 with fillers or ties 1.0 0.94 1.0 2 without fillers or ties 1.0 3 single component members 1.0 0.94 for bending the effective slenderness ratio k/r to determine fe where k is top chord joist substitutes ext k-series outriggers c ii kcs joists 1.0 top chord end panels all bottom chord panels a the slenderness ratios 1.0/r and 1.0s/r of members as a whole or any component part shall not exceed 120 for top chords or 240 for bottom chords b the effective slenderness ratio k/r to determine fcr where k is 1 with fillers or

introduction sji standard specifications ­ k-series american national sji-k-2010 american american national national standard standard standard sji-k-2010 sji-k-2010 section section 5 5 5.1 usage usage 5.1 this specification specification shall shall apply apply to to any any type type of of structure structure where where floors floors and and roofs roofs are are to to be be supported supported directly directly by by steel steel joists joists this installed as as hereinafter hereinafter specified specified where where joists joists are are used used other other than than on on simple simple spans spans under under uniformly uniformly distributed distributed loading loading installed as prescribed prescribed in in section section 4.1 4.1 they they shall shall be be investigated investigated and and modified modified when when necessary necessary to to limit limit the the required required stresses stresses to to as those listed listed in in section section 4.2 4.2 those when a a

introduction sji standard specifications ­ k-series american national standard sji-k-2010 american national standard sji-k-2010 b thickness cast-in-place slabs shall be not less than 2 inches 51 mm thick c centering centering for cast-in-place slabs shall be permitted to be ribbed metal lath corrugated steel sheets paper-backed welded wire fabric removable centering or any other suitable material capable of supporting the slab at the designated joist spacing centering shall not cause lateral displacement or damage to the top chord of joists during installation or removal of the centering or placing of the concrete d bearing slabs or decks shall bear uniformly along the top chords of the joists e attachments the spacing for slab or deck attachments along the joist top chord shall not exceed 36 inches 914 mm and shall be capable of resisting a nominal unfactored lateral force of not less than 300 pounds 1335 n i.e 100 plf 1.46 kn/m f wood nailers where wood nailers are used such

introduction sji standard specifications ­ lh/dlh-series american national standard sji-lh/dlh-2010 american national standard sji-lh/dlh-2010 steel joist institute sji sji-cosp-2010 code of standard practice for steel joists and joist girders technical digest no 3 2007 structural design of steel joist roofs to resist ponding loads technical digest no 5 1988 vibration of steel joist-concrete slab floors technical digest no 6 2011 structural design of steel joist roofs to resist uplift loads technical digest no 8 2008 welding of open web steel joists and joist girders technical digest no 9 2008 handling and erection of steel joists and joist girders technical digest no 10 2003 design of fire resistive assemblies with steel joists technical digest no 11 2007 design of lateral load resisting frames using steel joists and joist girders technical digest no 12 2007 evaluation and modification of open web steel joists and joist girders steel structures painting council sspc 2000

introduction sji standard specifications ­ lh/dlh-series american national standard sji-lh/dlh-2010 american national standard sji-lh/dlh-2010 103.3 maximum slenderness ratios general joist information economical design guide the slenderness ratios 1.0/r and 1.0s /r of members as a whole or any component part shall not exceed the values given in table 103.3-1 parts a the effective slenderness ratio k/r to be used in calculating the nominal stresses fcr and fe is the largest value as determined from table 103.3-1 parts b and c in compression members when fillers or ties are used they shall be spaced so that the s/rz ratio of each component does not exceed the governing /r ratio of the member as a whole the terms used in table 103.3-1 are defined as follows length center-to-center of panel points except 36 inches 914 millimeters for calculating /ry of top chord member in mm maximum length center-to-center between panel point and filler tie or between adjacent fillers ties in mm

introduction sji standard specifications ­ lh/dlh-series american national standard sji-lh/dlh-2010 american american national national standard standard sji-lh/dlh-2010 sji-lh/dlh-2010 103.7 103.7 verification verification of of design design and and manufacture manufacture a a design design calculations calculations companies companies manufacturing manufacturing any any lhlh or or dlh dlh-series -series joists joists shall shall submit submit design design data data to to the the steel steel joist joist institute institute or or an an independent independent agency agency approved approved by by the the steel steel joist joist institute institute for for verification verification of of compliance compliance with with the the sji sji specifications specifications design design data data shall shall be be submitted submitted in in detail detail and and in in the the format format specified specified by by the the institute institute b b in-plant in-plant inspections inspections each

introduction sji standard specifications ­ lh/dlh-series american national standard sji-lh/dlh-2010 american national standard sji-lh/dlh-2010 104.10 deflection the deflection due to the design live load shall not exceed the following floors roofs 1/360 of span 1/360 of span where a plaster ceiling is attached or suspended 1/240 of span for all other cases general joist information economical design guide top chord joist substitutes ext k-series outriggers the specifying professional shall give consideration to the effects of deflection and vibration in the selection of joists for further reference refer to steel joist institute technical digest 5 vibration of steel joist-concrete slab floors and the institute s computer vibration program 104.11 ponding the ponding investigation shall be performed by the specifying professional for further reference refer to steel joist institute technical digest 3 structural design of steel joist roofs to resist ponding loads and the aisc

introduction sji standard specifications ­ joist girders american national standard sji-jg-2010 american national standard sji-jg-2010 astm a1008/a1008m-09 standard specification for steel sheet cold-rolled carbon structural high-strength low-alloy and high-strength low-alloy with improved formability solution hardened and bake hardenable astm a1011/a1011m-09a standard specification for steel sheet and strip hot-rolled carbon structural highstrength low-alloy high-strength low-alloy with improved formability and ultra-high strength american welding society aws aws a5.1/a5.1m-2004 specification for carbon steel electrodes for shielded metal arc welding aws a5.5/a5.5m:2006 specification for low-alloy steel electrodes for shielded metal arc welding aws a5.17/a5.17m-97:r2007 specification for carbon steel electrodes and fluxes for submerged arc welding aws a5.18/a5.18m:2005 specification for carbon steel electrodes and rods for gas shielded arc welding aws a5.20/a5.20m:2005 specification

introduction sji standard specifications ­ joist girders american national standard sji-jg-2010 american national standard sji-jg-2010 1003.4 members a chords the bottom chord shall be designed as an axially loaded tension member the radius of gyration of the bottom chord about its vertical axis shall not be less than /240 where is the distance between lines of bracing the top chord shall be designed as an axial loaded compression member the radius of gyration of the top chord about the vertical axis shall not be less than span/575 the top chord shall be considered as stayed laterally by the steel joists provided positive attachment is made the outstanding part of the top chord member shall be designed such that the allowable reaction from a single joist is the lesser of pp and pp 1.6 ­ f au/qfy qfy 0.6pp and 0.6pp1.6 ­ f a where fy pp q b f au fa g k t specified minimum yield strength ksi mpa 2 plastic failure mode t fy 2b-k g+5.66b-k form factor defined in section 1003.2b

introduction sji standard specifications ­ joist girders american national standard sji-jg-2010 american american national national standard standard sji-jg-2010 sji-jg-2010 1004.9 1004.9 uplift uplift where uplift uplift forces forces due due to to wind wind are are a a design design requirement requirement these these forces forces shall shall be be indicated indicated on on the the contract contract drawings drawings in in where terms of of net net uplift uplift in in pounds pounds per per square square foot foot pascals pascals the the contract contract drawings drawings shall shall indicate indicate if if the the net net uplift uplift is is based based on on terms asd or or lrfd lrfd when when these these forces forces are are specified specified they they shall shall be be considered considered in in the the design design of of joist joist girders girders and/or and/or bracing bracing if if asd the ends ends of of the the bottom bottom chord chord are are not not strutted