Factors affecting growth, height and structural form

• Speed of erection :
  • Congested city states
  • Difficult access
  • Planning and organisation of construction sequence
  • Repetitive operations and prefabrication
  • Improved techniques, e.g. slipform, flying form, concrete pumping, climbing crane etc
• Tall vs low-rise buildings : Provision of lateral stiffness for
  • limiting deflections
  • prevent dynamic motions