Question

A floor in an existing building has a W200 x 52 beam that spans 3 m. The steel is CSA G40.21 350VW c. Determine the class of the section d. Determine the critical unsupported length. e. Calculate the factorejd moment resistance of the section. f. Calculate the shape factor A heavy pump is going to be installed on the floor, necessitating an increased bending capacity for this one beam. It has been decided to attach a welded 350 x 20 mm plate to increase the bending capacity as much as possible. g. Determine the factored moment resistance of the built-up section. h. Calculate the shape factor for the built-up section. i. Determine the critical unbraced length for the built-up section.

Answer 1

CSA GID、21 350 W steel 50 ksi345 MP fu .. 65 ksi 415 MPa D= 206mm 126 m 512 mm, 'る: 569 Table 2, Pa. 181工8800 : 200T b= b 2DL 1の2 12. From oud standing element onpression flarge conditin, fy fo.γ Compact section = 10.5 E= 10.5x/250 344 = 8.9382

Flange ponton is con1pact section Fs web otion Nes d wid-depth 206 2x126 t) calulied = 22, 861 plasbc tu wlelb potion is plestic sechion We Con ideべ oversall section as weaker of bơth. and hente, overal 200 x62 section is Compact section. bea52 ka lm om i simply supposted, ancemau monet on beam due to udI (celf-weight) 0.52xL o.og辄2부. = shes toce

Momenttance of section, compact se ttion 569 2 345 MPa 2. | 96 305 rio-3-0 , 09% Coneing pinned ends Maxinun unsupponted 2.01 34m can e provided Factored omerdt of resictome of the se ction 叶.regns tance 는 196.305 N ,m from)

( ? section, ection rusie w-shapes Plastic onet スー てPe - s89 G12 sa the x-イaxis 266 C shape fathos abod the y-y avis) Ou