Double-Lok® is a metal standing seam roofing product attached to sub-framing using a variety of concealed, interlocking clips
that provide for minimum panel penetrations. Double-Lok panels can be used on new construction as well as retrofit on existing
structures. This panel design provides a high degree of weathertightness and has been tested by independent laboratories in
accordance with ASTM E283 and E331 (for air infiltration, water penetration, and wind uplift).
24 gauge (standard)
50' maximum is standard but longer lengths
available by special request
24" wide by 3" high (standard)
18" also available
Signature® 200 Colors
Signature® 300 Colors
Recommended for roof slopes of ¼:12 or
greater. Fixed clip recommended only for double slope buildings 200' wide or less and single
slope buildings 100' wide or less. (May vary
upon extreme weather conditions.) Oil-canning
is not a reason
Concealed fastening system. The clips are
available as floating or fixed. Two different clip
heights are available to allow for thermal blocks.
New and retrofit applications
Panel penetration is eliminated over the entire building envelope other than
at the end laps and panel ends which are connected by a compression joint
Factory notched at both ends with pre-punched holes
End laps feature a 16 gauge backup plate with pre-punched holes
Fewer exposed fasteners (by 80%) than traditional side lap panels
Air infiltration and water penetration tests under IAS E283 and E331
methods performed on side lap panels
Signature® 300 paint system
Tall or short clips
Panel side laps feature a factory
UL® 90 and FM rated
Optional product and weather
Assures a weathertight
Maximizes field installation efficiency with installation allowed
from either end of building or on both sides simultaneously
Allows solid connection at end laps plus proper fastener spacing;
Pre-punched holes facilitate installation and assure proper panel placement
Assures specifiers of minimal air infiltration and water penetration
25-year finish warranty
Maximizes insulation systems options including 1" thermal spacers
Facilitates weathertight construction and ease of installation
Lowers insurance costs
Adds to customer confidence
Double-Lok® - Section Properties
All calculations for the properties of Double-Lok® panels are calculated in accordance with the 2001 edition of the North American Specification For Design Of Cold-Formed Steel Structural Members.
Ixe is for deflection determination.
Sxe is for bending.
Maxo is allowable bending moment.
All values are for one foot of panel width.
Allowable Uniform Loads
In Pounds Per Square Foot - 24" Panels
24 Gauge (Fy = 50 Ksi)
SPAN IN FEET
22 Gauge (Fy = 50 Ksi )
SPAN IN FEET
Allowable Uniform Loads Notes:
Allowable loads are based on uniform span lengths and Fy = 50 ksi.
LIVE LOAD is limited by bending, shear, combined shear and bending and web crippling.
Allowable loads consider a maximum deflection ratio of L/180.
The weight of the panel has not been deducted from the allowable loads.
THE ALLOWABLE UNIFORM LOADS ARE NOT FOR USE WHEN DESIGNING PANELS TO RESIST WIND UPLIFT.
Please contact manufacturer or manufacturer's website for most current allowable wind uplift loads.
The use of any field seaming machine other than that provided by the manufacturer may damage the panels,
void all warranties and will void all engineering data.
The engineering data contained herein is for the expressed use of customers and design professionals. Along with this data,
it is recommended that the design professional have a copy of the most The engineering data contained herein is for the expressed use of customers and design professionals. Along with this data, it is recommended that the design professional have a copy of the most current version of the North American Specification for the Design of Cold-Formed Steel Structural Members published by the American Iron and Steel Institute to facilitate design. This Specification contains the design criteria for cold-formed steel components. Along with the Specification, the designer should reference the most current building code applicable to the project jobsite in order to determine environmental loads. If fur ther information or guidance regarding cold-formed design practices is desired, please contact
EFFECTIVE NOVEMBER 3, 2004
SUBJECT TO CHANGE WITHOUT NOTICE
Double-Lok® is a registered trademark of the NCI Group. Galvalume Plus® is a registered trademark of BIEC International, Inc. Signature® is a registered trademark of the
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