Sure-Panel hairline joint aluminum column covers at Navy Pier in Chicago

Hairline Joint Column Covers

Name: Sure-Panel Hairline Joint Column Covers
Brand: Sure-Panel

Sure-Panel Hairline Joint column covers hide everything that makes a column cover look cheap. Rough edges, fasteners, adhesives and caulk are veiled by an internal key-slot system, so the installed cover shows only a subtle hairline joint. It's our cleanest-looking column cover for lobbies, atriums, storefronts and feature columns.

How the hairline joint works

Each cover is fabricated in sections that lock together through an internal key-slot system. The connection is behind the face, so there are no exposed fasteners and no sealant line. What you see is a thin, consistent hairline where the sections meet.

Why architects specify hairline joints

The seam nearly disappears. Good for high-visibility interior columns and premium exteriors.
No caulk to discolor or maintain.
Clean finished edges. Rough edges are concealed inside the joint.
Round or square. Available for round and square columns, plus custom shapes.

Installation (general sequence)

From the Sure-Panel Column Cover Installation and Storage Guide. Shop drawings and job-specific details govern.1. Base angles: locate base angles at 24" o.c. maximum. Use PVC shims under the clips to separate dissimilar metals.2. Clip angles: refer to the shop drawings for dimension "A", determine the proper clip depth, and fasten the clip angles to the base angles.3. Male half: set the top of the column 3/4" below the ceiling and attach the male half of the column to the clips. The bottom ring should be 1/4" above the floor. A 3/4" joint at the top is required for keyhole slot engagement.4. Female half: set the female half by engaging the bolts into the keyhole slots. Turn the bolts in or out as required for engagement while keeping a tight joint between the column halves.5. Top closure (optional): an angle reveal at the top sets inside the column and closes off the 3/4" gap.

Jobsite storage

Store column covers indoors, away from the elements. If crates must be stored outside: put a plastic cover on the ground, raise the crates off it, set them at an angle so water drains, support them so they don't bow, and cover them with a loose-fitting waterproof tarp that still lets air circulate. Moving crates from a cold area to a warm one causes condensation between covers, so limit water contact, temperature extremes and storage time, and dry any wet bundles right away.

Lead time

Column cover fabrication in as little as 3–4 weeks (about 6–8 weeks with drafting). We ship nationwide.

Column cover materials, sizes and finishes

From the Sure-Panel column cover specification (Section 05 58 13):

3003-H14 aluminum (painted), .090"–.125": PVDF / Kynar (standard)
5005 anodic-quality aluminum (anodized), .090"–.125": Powder coat
ACM, 4 mm or 6 mm FR core: Anodized
304 or 316 stainless steel, 16 ga: Brushed stainless, mill, primed
Minimum diameter: 8"
Max length (round or square): 15' (longer requires a stack joint)
Round covers over 34" diameter: Require vertical joints
Square covers over 26": Require vertical joints

Approximate panel weights: .080" aluminum 1.14 lb/sf · .090" 1.28 lb/sf · .125" 1.78 lb/sf · 4 mm FR ACM 1.56 lb/sf · 6 mm FR ACM 2.23 lb/sf · 16 ga stainless 2.5 lb/sf.

Shapes: round, square, rectangular and custom profiles, plus capitals, bases, rings and reveals. Perforated covers can be used for internal lighting effects.

Featured project: Navy Pier, Chicago

Sure-Panel fabricated 18 hairline joint column covers for Navy Pier in Chicago: 36.5" diameter by 27 feet tall, in .125" 3003-H14 aluminum finished in Acadia Silver. Covers that tall are built with stack joints (round covers over 15' require one). Read the case study.

Compare column cover joints

Joint look: Hairline: Subtle hairline; Reveal: Clean vertical reveal with "C" channel insert; Caulk: Sealed sealant line
Attachment: Hairline: Internal key-slot system; Reveal: Clips mechanically fastened to panels and substructure; Caulk: Clips on rout-and-return legs, hard-fastened to structure
Sealant: Hairline: None visible; Reveal: None; Caulk: Foam backer rod + silicone
Best for: Hairline: Lobbies, high-end interiors and exteriors where the joint should disappear; Reveal: Exterior or interior designs that want a deliberate reveal line; Caulk: Exterior columns needing maximum weather protection