Definitions

Hem → A fold over the outside edge of metal to add rigidity, prevent cutting/slicing of hands when handling, & allows for tight connection of pieces @ Seam.

Diagram of a hem: the metal edge folded back over itself

Pocket → The cavity where siding materials get tucked into in order to cover the end, bottom or top of material.

Diagram of a pocket showing pocket coverage and pocket depth

Flat-Lock → A locking system that utilizes a 180° bend + clips/cleats to Secure pieces of metal together.

Diagram of a flat-lock seam held with a cleat or clip

S-lock → A locking System that utilizes adouble 180° Bend to secure pieces of metal together.

Diagram of an S-lock joining two pieces of metal

Return/Tab → A 90° bend to cover seam joint/Connection.

Diagram of a return or tab bent 90 degrees over a seam

Definitions

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