ARCE $315-$ Introduction to Structural Design

Instructer: C$,$ we't

$2.$ Alter the truss depth to $3ft$ and determine the forces in the same critical members: top and bottom chord at the center, diagonal in outside panel. Discuss the change in member forces compared with the truss of problem $1.$

$3.$ For the braced frame elevation shown below with $15ft$ story heights:

Calculate the horizontal and vertical reactions at the base of each of the two frames Clearly show which forces are tension and compression.

Calculate the force in each bortom brace and for the columns at the first floor level. Clearly show which forces are tension and compression.

Select a column $($W section$)$ and a brace $($HSS section$)$ size for compression using the design manual.

Glven an allowable tensile stress of $A,$ are the column and brace sizes adequate for tension?

$4.$ Given the framing layout shown in plan below for the three$-$story buliding shown in elevation below and Service Roof Dead Load: $80$ pst Service Roof Uve Load: $20$ pst Service Floor Dead Load: $80$ psf Service Floor Live Load: $40$ pst

a$.$ Determine the size of OWs spaced at $2ft0.c.$ spannine $50ft$ at the floor

b$.$ Determine the size of interior girders spanning $24ft$ at the floor

c$.$ Determine the size of interior columns between the ground and $2^{td}$ floor.

Cakifornila Porytechnic Stste Unimarilty, Sto

Arthitectiaral Engineering Department

ARCE $315-$ Introduction to Structural Design

Instructar C$.$ Weit

Oafice acaline