S-5-A SF Aluminum SnoRail/SnoFence Clamp

The S-5! A-SF Aluminum SnoRail/SnoFence Clamp is engineered for use with the SnoRail and SnoFence snow retention systems on standing seam metal roofs. Constructed of high-quality aluminum, it accommodates both vertical and horizontal seam orientations by rotating the clamp 90°, and is built for seams with finished thickness up to 0.40″. The clamp uses patented round-point stainless steel setscrews designed to dimple, not pierce, the roof panels—maintaining the coating and allowing thermal movement. It supports one 3/8″ rod (SnoRod) for single-rail SnoRail or, when combined with a post, enables a double-rail SnoFence configuration for enhanced snow control.

Key Features:

• Aluminum clamp body (non-copper compatible) designed for standing seam seams up to 0.40″ thickness
• Fits both vertical and horizontal seam profiles (rotate clamp 90° for horizontal seams)
• Uses round-point stainless steel setscrews to grip seam without penetration
• Supports one 3/8″ rod (for SnoRail) or two rods (with post) forming SnoFence system
• Durable aluminum body with stainless hardware, designed for snow retention performance

• Type: Intermediate aluminum clamp (A-SF model) for SnoRail/SnoFence systems
• Material: 6061-T6 aluminum clamp; 18-8 stainless steel setscrews
• Seam compatibility: Standing seam profiles, vertical or rotated horizontal; finished seam thickness ≤ 0.40″ (≈ 10.16 mm)
• Rod capacity: One 3/8″ (≈ 9.5 mm) SnoRod for SnoRail; two rods with post for SnoFence
• Includes: Clamp body, stainless steel setscrews (two), rod hole, and hardware for installation

• Verify seam profile and confirm finished seam thickness is ≤ 0.40″.
• Rotate clamp 90° if installing on a horizontal seam.
• Place clamp body over seam and align for proper fit.
• Insert stainless steel round-point setscrews and hand-tighten to seat the clamp.
• Insert 3/8″ SnoRod through the clamp for SnoRail; for SnoFence, thread post and add a second rod approximately 2″ above the first.
• Torque setscrews to specification and re-check after initial load cycles.

Q: Is the A-SF clamp compatible with copper roofs?
A: No. The aluminum A-SF is intended for non-copper seams. For copper roofs, brass clamp models are used.

Q: What is the maximum seam thickness it fits?
A: The clamp is designed for seams up to 0.40″ finished thickness.

Q: How many rods can the A-SF clamp support?
A: It supports one rod in SnoRail mode; with a post, it can support two rods for SnoFence.

Q: How do you prevent rods from sliding laterally?
A: Use end clamps (A-E model) or SnoPost E at end or fixed positions to lock rods in place.