Building Structures

ARCHITECTURAL CONSIDERATIONS 11
Reinforced
concrete
column
Low strength
High strength
Low concrete strength
Low % of reinforcement
Low steel strength
High concrete strength
Can effect strength
change up to 10 to 1
with little change in
outer finished size
Figure 1.16 Variation in column
strength without change in
architectural finished size.
High % of reinforcement
High-strength steel
Steel
column
Low strength
Low-strength steel
Thin web and flangs
High strength
Fire protection jacket
High-strength steel
Can effect strength
change up to 20 to 1
with little change in
outer finished size
Thick web and flanges
with possible added
outer plates
Figure 1.17 Patterns of size increase for
columns in multistory buildings.
Figure 1.18 Building–ground relationships.