|
<br />I]
<br />
<br />II
<br />
<br />I J ..
<br />l .
<br />
<br />IL
<br />
<br />lL
<br />
<br />l]>.
<br />
<br />[ I
<br />
<br />~-c~
<br />
<br />TABLE 4-1 MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS, L6' AND MINIMUM CONCENTRATED LIVE LOADS (continued)
<br />
<br />OCCUPIli1CY or U.e Uniform Cone,
<br /> paf (/IN/ma) lb(kN)
<br />Roofs 20 (0.96)h
<br />Ordinary flat, pitched, and curved roofs
<br />Roofs used for promenade purposes 60 (2.87)
<br />Roofs used Cor roof gardens or assembly purposes 100 (4,79) I
<br />Roofs used for other special purposes I
<br />Awnin: and clll10fies S (0.24) nonreduceable
<br />Fab construction supported by a lightweight rigid skeleton structure
<br />All other construction 20 (0.96)
<br />Primary roof members, exposed to B work Iloor 2.000 (8.9)
<br />Single panel point of lower chord ohoof trusses or any point along primary
<br /> structurlll members supporting roofs over manufactunng, storage warehouses,
<br /> and repair garages 300 (1.33)
<br />All other occupancies
<br />All roof sudaces subject to mainrenance workers 300 (1.33)
<br />Schools
<br />Clusrooms 40 (1.92) 1,000 (4.45)
<br />Corridors above first floor 80 (3.83) 1,000 (4,45)
<br />First-floor conidors 100 (4.79) 1,000 (4.45)
<br />Scuttles, skylight ribs, and accessible ceilings 200 (0,89 )
<br />Sidewalks, vehicular driveways, and yards subject to trucking 250 (11.97)' . 8,000 (35.60)/
<br />Stadiums and arenas 100 (4. 79)d
<br />Bleachers
<br />Fixed seats (Castened to floor) 60 (2,87)"
<br />SlIlirs and exil ways 100 (4.79) ,
<br />One- and two-family residences only 40 (1.92)
<br />Storage areas above ceilings 20 (0,96)
<br />Storage warehouses (shall be designed for heavier loads if required for anticipated storage) 125 (6,00)
<br />Light
<br />Heavy 250 (11.97)
<br />Stores
<br />Retail 1,000 (4.4.5)
<br />Frrst floor 100 (4.79)
<br />Upper floors 75 (3.59) 1,000 (4.45)
<br />Wholesale, all floors 125 (6.00) 1,000 (4,45)
<br />Vehicle barriers See Section 4,4
<br />WalkwiM and elevated platfoims (other than exit ways) (6012.87)
<br />Yards and ~, pedestrian (jOO)4,79)
<br />
<br />aFloors in garages or portions of a building used for the storage of motor vehicles shaIl be designed for the uniformly distributed live loads of Table 4-1 or the
<br />following concentrated load: (I) for garages restricted to passenger vehicles accommodating not more than nine passengers, 3,000 Ib (13,35 kN) acting on an
<br />area of 4.5 In. by 4.5 In, (114 mm by 114 mm) footprint of a jack; and (2) for mechanical parldng structures without slab or deck that are used for storing
<br />passenger car only. 2,250 lb (10 kN) per wheel. .
<br />bGarages accommodating trucks and buses shaIl be designed in accordance with an apprOved method, which contains provisions for truck and bus loadings.
<br />cThe loading applies to sUlck room floors !hat support nonmobile, double-faced library book stacks subject to the following limitations: (I) The nolnlnal book
<br />stack unit height shall not exceed 90 in. (2290 mm); (2) the nominal shelf depth shall not exceed 12 in, (305 mm) for each face; and (3) parallel rows of
<br />double-faced book stacks shall be separated by aisles not less than 36 in. (914 mm) wide.
<br />dIn addition to the vertical live loads, the design shaIl include horh:onial swaying forces ap~lied to each row of the seats as follows; 24 Ib per linear ft of scat
<br />applied in a direction parallel to each row of seats and 10 Ib per linear ft of seat applied 10 a direction perpendicular to each row of seats, The parallel and
<br />perpendicular horizontal swaying forces need not be applied simultaneously. .
<br />'Other uniform loads in accordance with an approved method, which contains provisions for lruck loadings, shall also be considered where appropriate.
<br />/The concentrated wheel load shall be applied on an area of 4,5 in. by 4.5 in. (114 mm by 114 mm) footprint of II jack.
<br />'Minimum concentrated load on stair treads (on area of 4ln.z (2,.580 mm2]) is 300 Ib (1.33 kN).
<br />"Where uniform roof live loads are reduced to less than 20 1bJft2 (0.96 kN/m1) in accordance with Section 4.9.1 and iIre applied to the design of structural I
<br />members lI1T8J1ged so as 10 create continuity, the reduced roofIlve load shall be applied to adjacent spans or to alternate spans, whlcheverproduces the greatest
<br />unfavorable effect.
<br />IRoofs used for other special purposes shalfbe designed for appropriate loads as approved by the authority having jurisdiction. .
<br />
<br />TABLE 4-2 LIVE LOAD ELEMENT FACTOR, KLL
<br />
<br />Element ., Ku!.
<br />Interior columns 4
<br />Exlerior columns without cantilever slabs 4
<br />Edge columns with cantilever slabs 3
<br />Comer columns with cantilever slabs 2
<br />Edge beams without cantilever slabs 2
<br />Interior beams 2
<br />All other members not identified 1
<br />including:
<br />Edge beams with cantilever slabs
<br />Cantilever beams
<br />One-way slabs
<br />1\vo-way slabs
<br />Members without provisions for contiouous
<br />shear transfer nonnalto their span
<br />
<br />aln lieu of the preceding values, KLL is pennitted to be calculated.
<br />
|