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Scupper

(1) An opening for drainage in a wall, curb or parapet. (2) The drain in a downspout or flat roof, usually connected to the downspout. An outlet in a parapet wall for the drainage of overflow water from the roof to the outside of a building.

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Sealer

A finishing material, either clear or pigmented, that is usually applied directly over raw wood for the purpose of sealing the wood surface. A material used to seal the surface of a material against moisture.

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Section Modulus (S)

Numerical relationship, expressed in in.3, of the resistance to stress of a member. It is equal to the moment of inertia divided by the perpendicular distance from the neutral axis to the extremity of the member.

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