Architectural Valley Note: Water diverter should equal panel rib height.
Architectural Rake/Gable Note: Rake/Gable flashings should be installed working from bottom to top of roof.
Sculptured Commercial Flashings
Commercial Gutters Sculptured Post-Hung Gutter System Box Pre-Hung Gutter System
Flashing Packaging Shrink Wrapped Wood Crate
Four questions to help determine the proper fastener: 1. What materials are being fastened? 2. What are the load requirements? 3. What are the service requirements? 4. What is the environment? Fasteners/Screws
List each type of material (steel, wood, rigid insulation).
List the thickness of each material. (Determines attachment thickness)
#1 What materials are being fastened ? Steel Purlin Wood Decking Steel Decking
Allow at least 3 threads to extend beyond all materials. (Screw will be at least 1/2” – 1” longer than attachment length.) Attachment thickness + ½” # 1 What materials are being fastened?
Uplift load Relates to the pullout / tensile / pullover strength of the screw – washer.
Shear load Relates to the shear strength / ductility of the screw.
Bending #2 What are the load requi rements? Shear Shear Tensile Pullover
Expansion & Contraction?
Prying on the Joint?
Identify conditions that can affect the screws performance. #3 What are the service requirements?
Description : #12-14 x 1-1/4” DP2 Self-Drilling Screw. 5/16” Hex Washer Head. Undercut with EPDM Sealing Washer. Carbon Steel. Zinc Plated with 1,000hrs salt spray coating. Fastener/Screw Terminology Head Style Major Diameter Threads Per Inch Fastener Length Point Type #12 - 14 x 1-1/4” DP2 5/16” HWH Major Diameter Threads Per Inch Fastener Length Point Type Head Style
2. “Fine” Thread
Use in thick metal
Slower to install.
Provides more thread engagement.
1. “Coarse” Thread
Use in thin metal and wood.
“ Steep” thread installs faster.
“ Steep” thread loosens more quickly.
Fastener Thread Types TWO GENERAL TYPES OF THREADS
Hex Head Pan Flat Wafer Hex Washer Flat Cuntersunk Head and drive systems for a variety of conditions Pancake Fastener/Screw Head Styles
Point Type Drilling Thickness DP1 Thin (.018” - .090”) DP2 Thin Medium (.035” - .140”) DP3 Medium (.090” - .250”) DP4 Medium/Heavy (.145” - .375”) DP5 Heavy (.250” - .500”) A - DP1 Light Gauge (Thin Metal) B - DP5 Heavy Gauge The thicker the material to be fastened, the larger the point “Type”. Self Driller Point Types B A
Stainless Steel Cap
Zinc and Aluminum alloy is compatible with sheet coatings.
Uncoated zinc head will oxidize and turn black in color.
Uncoated head will not turn black in color.
May react with Galvalume in severe coastal conditions.
Zinc Cap / Cast Head Fasteners with 20 Year Warranties
Flange Seal Head Sealant Materials EPDM: Standard (Non conductive) Neoprene: Petrochemical
Optimal sealing performance when installed at an angle.
Provides greater pullover strength.
Nicer installed appearance.
Paint damage minimal.
More back-out resistance
Bonded Washers Fastener/Screw Washer Types
Fastener Materials and Strength
Carbon Steel (C1018-C1022) case hardened
410 stainless steel bright case hardened
Modified 304 stainless steel - Cold worked
316 stainless steel - Cold worked
Fastener/Screw Materials PSI (000) Material Strength
Increased Corrosion Resistance Fastener/Screw Corrosion Long Life Coated Stainless Steel Zinc Plated
1/8” Pop Rivet Pop rivets are used to hold two pieces of sheet metal together, common at flashing laps, using a 2-Step method; Step #1 - 1/8” Hole is Drilled Through both Pieces. Step #2 - Insert Pop Rivet in Hole with Rivet Gun
Standing Seam Panel Clips
1. Floating Clip:
Independent base and tab.
Used with panel lengths greater than 30’-0”.
TWO GENERAL TYPES OF CONCEALED CLIPS
2. Fixed Clip:
One solid piece.
Used with panel lengths less than 30’-0” or snap down panels .
Note: Base of floating clip should be centered when installed.
Thermal Expansion & Contraction Definition: The natural characteristic of a length of metal to expand or contract relevant to a change in the metals temperature. Heat and sun expands/Cooling and shade contracts.
Sealants TWO GENERAL FORMS OF SEALANT
1. Tube Sealant
Average usage per tube of 25’-0”.
2. Roll/Tape Sealant
Double beaded butyl sealant
Roll lengths of 40’-0”.
TWO GENERAL FORMS OF SEALANT
Roof Boots/Jacks Note: Silicone boots used on high temp penetrations.