HomeMy WebLinkAboutAPPROVED Section EST. LUCIE WORKS
Section E (Tile Calculations)
For Moment based tile systems, choose either Method 1 or 2. Compare the values for Mr with the values from Mf. If the Mr values
are greater than or equal to the Mr values, for each area of the roof, then the tile attachment method is acceptable.
Method 1'Moment Based Tile Calculations Per RAS 12T
(Zone 1: x _ Mg; = M,, Product Approval Mi
(Zone 2e: x )= �a _ Mg: = M2a Product Approval Mf--
(Zone 2n: x ;L = _� - Mg: = Mr,, Product Approval Mf
(Zone 2r: x JL = _) - Mg: = Me2f Product Approval Mf
(Zone 3e: ' x)'= Mg: = M,,% Product Approval Mf
(Zone 3r: x _ ._._� -- Mg: = Mrar Product Approval Mf.
Method 2 "Simplified Tile Calculations Per Table Below"
Required Moment of Resistance (Mr) From Table Belnw � l04__ Prnrli in Annrnval M,
Mr.required Moment
Resistance*
Mean Roof Height Roof Slope
1 15'
20'
25'
30'
40'
2:12
34.4
36.5
38.2
39.7
42.2
3:12
32.2
34.4
36.0
37.4
39.8
5:12
:12
30.4
28.4
26.4
12
30.1
28.0
33.8
31.6
29.4
35.1
32.8
30.5
37.3
34.9
32.4
7:12
24.4
25.9
27.1
28.2
3Q.0
ual uc ua CU III LUr3JUnGL1Un wiLn a 1151 oT moment oases tiie systems
• For Uplift based tile systems use Method 3. Compare the values for F' with the values for Fr If the F' values are greater than or
equal to the Fr values, for each area of the roof, then the tile attachment method is acceptable.
Method 3 "Uplift Based Tile Calculations Per RAS 12T
(Zone 1: x L =x W:= ) -W: cos r =Fri Product Approval F'
(Zone 2e: x L =x W:= ) -W: cos r =Frze Product Approval F'
(Zone 2n: x L =x W:= ) -W: cos r =Fr2n Product Approval F'
(Zone 2r: x L =x W:= ) -W: cos r =Fr2r Product Approval F'
(Zone 3e: x L =x W:= } -W: cos r =Fr3e Product Approval F'
(Zone 3r: x L =x W:= ) -W: cos r =Fr3r Product Approval F'
Where to Obtain Information
Description
Symbol
Where to find
Design Pressure
Zones 1, 2e, 2n, 2r, 3e, 3r
From applicable table in RAS 127 or by an engineering analysis
prepared by PE based on ASCE 7
Mean Roof Height
H
Job Site
Roof Slope
6
Job Site
Aerodynamic Multiplier
a
Product Approval
Restoring Moment due to Gravity
M8
Product Approval
Attachment Resistance
Mf
Product Approval
Required Moment Resistance
Mg
Calculated
Minimum Attachment Resistance
F'
Product Approval
Required Uplift Resistance
Fr
Calculated
Average Tile Weight
W
Product Approval
Tile Dimensions
L = length W = width
Product Approval
All calculations must be submitted to the building official at the time of permit application.