Blueprint Reading & Specifications Flashcards

In a door schedule on a residential blueprint, the 'HDW' column typically refers to:

Answer: Hardware set

HDW in a door schedule stands for hardware, referencing a hardware set number that specifies hinges, locksets, and closers.

What does a 'proprietary' specification require of a contractor?

Answer: A specific manufacturer's product must be used with no substitution

A proprietary specification names a specific product or manufacturer and does not allow substitutions unless 'or approved equal' language is added.

On a blueprint, a circle with a letter inside and lines extending to walls indicates:

Answer: A room name and number tag

Room name/number tags (bubbles) identify each space on the floor plan and link to room finish schedules.

What is the primary purpose of a 'reflected ceiling plan' (RCP)?

Answer: To show ceiling features, lighting, and HVAC registers as viewed looking up

An RCP shows what you would see if a mirror on the floor reflected the ceiling, including lighting layout, soffits, and mechanical registers.

When a blueprint note reads 'U.N.O.', it means dimensions or conditions apply:

Answer: Unless noted otherwise

U.N.O. means 'Unless Noted Otherwise' — the stated condition is the default unless a specific exception is called out nearby.

A residential blueprint shows a wall with diagonal hatching. This most commonly indicates:

Answer: A concrete or masonry wall in section

Diagonal hatching (crosshatching) in section views represents concrete or masonry materials per standard architectural graphic conventions.

What information is typically found in a 'window schedule' on residential blueprints?

Answer: Window size, type, glazing, and manufacturer series

Window schedules tabulate each window's mark number, rough opening size, unit size, type, glazing specification, and often the manufacturer.