§ 3129.07 Wind Loads on Signs, Tank Towers and Chimneys
BOCA Section 915.0 entitled “Wind Loads on Signs, Tank Towers and Chimneys” is hereby amended to read as follows:
Section 915.0 Wind Loads on Signs, Tank Towers and Chimneys.
(a) Signs in which the projected area exposed to wind consists of seventy percent (70%) or more of the gross area as determined by the over-all dimensions shall be classed as solid signs; those in which the projected exposed area is derived from open letters, figures, strips, and structural framing members, the aggregate total area of which is less than seventy percent (70%) of the gross area determined by the over-all dimensions, shall be classed as open signs.
(b) Signs, other than ground signs fifty (50) feet or less in height, shall be designed and constructed to withstand the horizontal pressures given in the following table applied to the net projected exposed area of all parts of the signs including structural framing, allowing for wind from any direction:
Table WS
Design Wind Pressures for Signs Other than Ground Signs 50 Feet or less in Height
Height from Ground to Top of Sign (Ft.) | Wind Pressure(Lbs. per Sq. Ft.)
Solid Signs(All Types) | Open Signs(All Types)
Height from Ground to Top of Sign (Ft.) | Wind Pressure(Lbs. per Sq. Ft.)
Solid Signs(All Types) | Open Signs(All Types)
Less than 50 | 25 | 35
50 to 99 | 30 | 42
100 to 199 | 35 | 49
200 to 299 | 38 | 53
300 to 399 | 40 | 56
400 to 499 | 42 | 58
500 to 599 | 43 | 60
600 to 799 | 44 | 61
800 to 999 | 45 | 63
1000 to 1199 | 46 | 65
1200 to 1399 | 48 | 67
1400 to 1599 | 49 | 68
1600 and over | 50 | 70
(c) Solid Ground Signs. Solid ground signs less than fifty (50) feet in height shall be designed and constructed to withstand a wind pressure of not less than twenty (20) pounds per square foot.
(d) Open Ground Signs. Open ground signs less than fifty (50) feet in height shall be designed and constructed to withstand a wind pressure of not less than thirty (30) pounds per square foot.
