Chapter 23: Measurement and Drafting Flashcards
How should the accuracy of field measurements me?
Take measurements at one-half the accuracy that will be required; generally 1/4” is sufficient.
What is an open dimension?
Part of a dimensions string that is not given a dimension value on the drawings.
What is an electronic distance measurement (EDM)?
Uses a laser-based instrument with an onboard computer to measure the distance, horizontal, and vertical angles of the instruments’s laser beam to a reflective prism target.
What is rectified photography?
Uses large-format, film-based view cameras to photograph facades. The camera’s focal plane is set parallel to the facade and gives a flat image with no perspective distortion.
What is laser scanning?
Uses medium-range, pulsing laser breams, which systematically sweet over an object or space to obtain 3D coordinates of points on the surfaces of the object or space being scanned. Has an accuracy ranging from 0.05% to 0.01% or better.
What is net area?
The actual occupant area required by a client to accommodate specific functions.
Net area does NOT include circulation space (corridors, stairways) or incidental space (closets, structural columns, walls).
What is an efficiency factor.
Used in preliminary planning for the total amount of space required. It’s the mathematical ratio of one area to another; take into account the required circulation space needed per tenant, as well as the non-usable area required for partitions, columns, etc.
The efficiency factor for a leased space is the ratio of the net area to the total occupant area.
Efficiency factors range from 0.60 to 0.80.
What is the occupant area?
The total portion of a building being actively used by a tenant.
What is the estimated required occupant area?
Calculated by dividing the net area by the efficiency factor.
What is rentable area?
The product of the tenant’s occupant area and a load factor to account for the shared portions of the building.
What is BOMA?
Building Owners and Managers Association produces standard detailing common methods of measuring space for retail, industrial, multi-unit residential, and mixed use buildings.
How is leasing space measured?
Measured from the inside glass surface of exterior walls OR inside surface of the exterior wall to the finished surface of the tenant side of the multi-occupant corridor partition and from the centerlines of partitions separating adjacent tenant spaces. Columns, recessed entries, and structural projections are disregarded.
What are the methods to determine rentable area?
1) Method A - the legacy method; uses a separate R/U ratio (rentable area divided by usable area) for each floor
2) Method B - the single load factor method; uses same load factor for all floors of a building and uses the R/O ratio (preliminary, or net, floor area divided by usable area)
Both methods arrive at the rentable area by multiplying the occupant area by a load factor.
How can you determine the space a client should consider leasing?
See page 23-7
Who is responsible for coordinating consultants?
On large projects, there may be an architect who coordinates the others, including the interior design consultant. On projects where the interior designer is the primary design consultant, he or she is responsible for coordination.
