Table 3.

Summary of responses from interviews with designers.

	criteria that governed steel design:
building number	vibration?	construction?	section depth?	further detail and comments
1	no	yes	no	torsion during construction; larger beam sizes the cheapest solution
2	no	no	no	no special criteria
3	no	no	no	deflection governed mainly
4	no	no	no	deflection governed mainly
5	no	no	no	applied loads reduced but too late to redesign
6	small areas	yes	small areas	perimeter beams governed by vibration or connection depth
7	small areas	no	no	mainly stress and deflection governed
8	no	no	no	many omitted beams were fabricated bespokely
9	small areas	no	no	many omitted beams were fabricated bespokely
10	no	no	no	had time to design thoroughly and no late changes
11	no	no	no	steelwork rationalized to reduce procurement costs
12	no	no	yes	building geometry optimized to reduce facade and heating costs
13	no	no	no	steelwork rationalized to reduce procurement costs
14	small areas	yes	small area	torsion during construction; larger beam sizes the cheapest solution
15	no	no	no	complex procurement procedure increased steel tonnage
16	no	no	no	complex procurement procedure increased steel tonnage
17	large areas	no	yes	shallow beams used to minimize cladding costs
18	large areas	no	yes	shallow beams used to minimize cladding costs
19	no	no	no	deflection governed most beam designs
20	large areas	no	no	vibration governed in many areas
21	small areas	no	yes	standardized beam depths for architectural reasons
22	no	yes	no	steelwork rationalized to allow faster construction
23	one area	yes	no	sizes repeated to allow faster construction