HomeMy WebLinkAboutLock-Deck Technical Dataac D.R CONSULTANTS, INC.
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PLEASE CONTACT OUR OFFICE AT (954) 431-4846, IF ANY ERRORS OCCUR IN
TRANSMISSION.
Operator:
9000 SHERIDAN STREET ❑ SUITE 136 ❑ PEMBROKE PINES, FLORIDA 33024 ❑ (954) 431-4846 ❑ FAX (954) 431-8332
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Footnotes:
1. R = Total thermal resistance of the assembly without roofing.
2. Assumes thermal conductivity (k) of 0,15. Some insulations have superior values.
Check with manufacturer.
3. Some codes allow up to 20% increase in R values of insulation which is continuous.
Check local codes for adjustment factors.
Footnotes for Span Tables:
1. Values followed by (f) are governed by stress. Allowable loads for floors when governed,
by deflection are half of those listed in the 1/180 column.
2. Bending stress relates to 2-month duration. It is riot exceeded when the listed loads
are applied based on recognized decking formulas.
3. In jurisdictions using ICBO, refer to ICBO Research Committee Report No. 1379 for
Western Species.
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EXAMPLE IN COMPUTING PITCHED ROOF
REQUIREMENTS
`= Given: 40 psf live load on horizontal projections of the roof
11 psf dead load including weight of deck
15 foot design span
1/24o allowable deflection
8 i� � 12 design pitch of roof
Random Length construction layup of decking
;F Load adjustments for roof pitch
Step 1—Enter graph with 40 psf live load. Read 33 psf load
on roof surface
Step 2—Add the 33 psf live load to applicable dead load per
square foot of roof surface (11 psf in this case)
33 + 11 = 44 psf.
Step 3—Enter graph with 44 psf total load. Read 36 psf
load component causing bending
With this load a 4" E1.5 decking will meet the required
specifications (check span tables).
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4. Span/loads shown assume compliance to layup rules described elsewhere. Longer spans may require specific lengths differing *HPMA—Hardwood Plywood Manufacturers
from the standard shipment —consult your Potlatch representative. Association UL—Underwriters' Laboratory.
5. Custom Grade 3" and 5" Southern Pine deflection values are 83% of the E1.8 values shown. 4" Southern Pine values are equal **Based on Hemlock, a similar species.
to E1.5 Idaho White Pine values except when bending governs.
6. Nominal 5" Fir/Larch will have a MOE of 1.7 x 106 psi unless special arrangements are made prior to manufacture.
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