Wind Load on Buildings (Envelope Procedure)

Output:

Definitions
• q_z = velocity pressure at height z
• K_d = 0.85 (Table 26.6-1 Open signs)
• L_c = 30 ft, Least horizontal dimension
Determine Velocity Pressure
q_z = 24.2 psf
• ft
• psf
External Pressure Coefficients
• Case 1:

  Zone	1	2	3	4	1E	2E	3E	4E
  GCpf	0.49	-0.69	-0.44	-0.38	0.74	-1.07	-0.64	-0.57
  Pressure	11.8	-16.7	-10.7	-9.3	17.9	-25.9	-15.4	-13.8

• Case 2:

  Zone	1	2	3	4	5	6	1E	2E	3E	4E	5E	6E
  GCpf	-0.45	-0.69	-0.37	-0.45	0.40	-0.29	-0.48	-1.07	-0.53	-0.48	0.61	-0.43
  Pressure	-10.9	-16.7	-9.0	-10.9	9.7	-7.0	-11.6	-25.9	-12.8	-11.6	14.8	-10.4

• Case 3:

  Zone	1T	2T	3T	4T	1	2	3	4	1E	2E	3E	4E
  GCpf	0.12	-0.17	-0.11	-0.10	0.49	-0.69	-0.44	-0.38	0.74	-1.07	-0.64	-0.57
  Pressure	2.9	-4.1	-2.7	-2.3	11.8	-16.7	-10.7	-9.3	17.9	-25.9	-15.4	-13.8

• Case 4:

  Zone	5T	6T	1	2	3	4	5	6	1E	2E	3E	4E	5E	6E
  GCpf	0.10	-0.07	-0.45	-0.69	-0.37	-0.45	0.40	-0.29	-0.48	-1.07	-0.53	-0.48	0.61	-0.43
  Pressure	2.4	-1.7	-10.9	-16.7	-9.0	-10.9	9.7	-7.0	-11.6	-25.9	-12.8	-11.6	14.8	-10.4
Internal Pressure Coefficients
• Enclosure Classification = Enclosed
• GC_Pi = -0.18 to 0.18 (Table 26.13-1)
Parapets, Overhangs, and Minimum Design Loads
• psf (on windward side)
• psf (on leeward side)
• psf (upwards, on windward side)
User Notes:
User notesPer cl. 29.7, a minimum load of 16psf is applied to the vertical projection of the structure.