The plans below show a public library building with an open deck car park underneath. Many of the walls and floors on the plan are labelled. You are required to fill in the table below, nominating the walls and floors that form part of the envelope of the building. You are also required to provide a brief written justification outlining the reasons for your answer.

Walls / floors forming part of the envelope of the building

Walls / floors not forming part of the envelope of the building

LOWER LEVEL PLAN (Not to scale) Ceiling 1 (above Ceiling 2 (above library) amenities) LOWER LEVEL PLAN (Not to scale) Ceiling 1 (above Ceiling 2 (above library) amenities)