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Installation Sequence Studio

Snap Coping-Max-C installation sequence

ANSI/SPRI/FM 4435/ES-1 edge system: 16 Ga Galv. Segmented Cleat w/Spring Clip, Snap-On Cover. 12" Face Max; 32" Wall Max; 6" Back Max.

Drexel guide (PDF)

This sequence follows Drexel Metals' published installation guide for the system. The project's specifications, the approved shop drawings and the roofing membrane manufacturer's requirements govern; where they differ, follow them and ask AFS. Source: Drexel Metals, “Installation Guide for Snap Coping-Max/Max-C”. Drexel publishes one guide for Snap Coping-Max-C and Snap Coping-Max.

Step 1 of 4

Installing Segmented Galvanized Cleat

  1. Before installing the cleat, make sure every metal component is isolated from ACQ-treated lumber with an appropriate membrane.
  2. Miter-cut the cleats together as needed at corners.
  3. Install the first cleat working away from the corner cleat, so half of the first cleat will be under the miter.
  4. Install additional cleats no more than 40" on center.
  5. Attach each cleat with a screw into every pre-punched hole.

As printed in the Drexel guide

“Additional Cleats to be installed no greater than 40" on center.”

“Attach the Cleat using #10-13x1-1/2" S.S. Panhead Woodscrews provided into each pre-punched hole.”

Common mistakes this step guards against

  • Do not space cleats more than 40" on center.
  • Do not set metal on ACQ-treated lumber without an isolating membrane.
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This step does not install the cover. Shown: the FlashDraft “Coping Cap - Both Edges Open” section, the cover only - the cleat, splice plates and fasteners are in the parts list.

Parts, lettered as in the guide

  • ASnap Coping Flashing 10'-0" Std. Lengths
  • B16GA Galvanized Segmented Cleat 12" Width, Spaced 40"o.c. MAX.
  • CSnap Coping Miter Cap (Outside Corner Shown)
  • D#10-13x1-1/2" S.S. Panhead Woodscrew Every Pre-Punched Hole (Included and Required)
  • ESnap Coping Splice Plate 6" Length (Installed over Cleat)
  • -Tube Sealant Shown at splice plates

Field checklist

Snap Coping-Max-C - from Drexel's guide. Tick each item as it is done; print this page for the crew.

Common mistakes

Each line is the reverse of an instruction the Drexel guide states.

  • Do not space cleats more than 40" on center. (step 1)
  • Do not set metal on ACQ-treated lumber without an isolating membrane. (step 1)
  • Do not cut lengths that leave short sections next to each other. (step 3)
  • Do not leave end caps or end terms unrestrained - fasten through the roof-side leg. (step 4)

Notes printed on the guide

  1. Isolate all metal parts from ACQ-treated wood, or any other galvanically incompatible material, with an appropriate membrane.
  2. Appliance attachments - lightning rods, signs, antennae - that penetrate the water seal, set up a galvanic reaction or otherwise compromise the roof edge system are to be eliminated or isolated, per section 8.0 of ANSI/SPRI ES-1. Isolate appliances from the edge system or do not attach them to it; the lightning protection manufacturer gives the attachment instructions.

Printed on the section detail

  • 32" max. tested wall width
  • Coping to be fabricated 1/2" larger than wall size to allow for any wall width variance and easier installation.
  • #10-13x1-1/2" S.S. Panhead Woodscrew through pre-punched hole

Drexel published ratings

Sustained pressure as Drexel publishes it (Drexel Metals DM-19063 "ES-1_GT-1 Certification Program Product Line Card" 12.09.25). Design Engineer must apply the Factor of Safety.

CoverFace up toWall up toCleatSustained pressure
24 gauge12"24"--170 psf
.040 AL12"24"--180 psf
.050 AL12"32"--155 psf