PLANNING GUIDELINES
DG 1110-3-112 May 1979
2-5 DEVELOPING THE BUILDING PROGRAM (cont'd)
Again multiply the number of spaces required for each space type times the NASF space allocated for
that type in Chapter 4.
(9) Determine Requirements for Support Spaces. Determine support space requirements accord-
ing to the individual space allowances given in Chapter 4, para 4-5. Consider use of existing spaces as
support spaces especially where existing spaces are to be used as instructional and/or staff spaces.
(10) Determine Total Net Space. Add support spaces to instructional (academic and vocational
training) and staff spaces to determine total NASF of new space required.
(11 ) Determine Gross Space. Gross space is determined by adding the space needed for such
things as circulation, building walls, and utility closets within the effective outside dimensions of the
building to the total net space required. One half area must be included for exterior covered
passageways, balconies and stairs. A rough estimate of GSF required may be obtained by multiplying
total NASF by a net to gross factor of 1.15.
(12) Compare Requirement Against Allowable. Check required gross space against maximum
gross space allowances in Table 2-1. If the required space does not exceed the allowable, enter the
figure on the DD Form 1391. If required space exceeds the allowable, revise requirements to con-
form with allowable. In revising the requirements, the following methods should be considered:
(a) Use 5-year projected needs, or current needs, in lieu of 10-year needs.
(b) Plan for use of Conditionally Usable Spaces as discussed in (6) (b).
(c) Increase Room Utilization Rate "u" in conjunction with the formula discussed in (5).
(d) Examine the net to gross factor for possible reduction.
(13) Determine Mechanical Space. Refer to the Approximate Mechanical Space column in Table
2-1 for a rough estimate of mechanical space needed in relation to gross space required. The actual
size should be estimated by a mechanical engineer taking into account the existence of central energy
sources, solar applications, etc. Enter the figure obtained on a separate line of the DD Form 1391.
c. OCCUPANT CAPACITY. Once space needs have been determined, the occupant capacity, in
number of students and staff, can be determined by adding the occupant loads given in Chapter 4 for
each type of instructional and staff space, taking into account the number of spaces required, by
multiplying the occupant load accordingly. This will provide the maximum peak load of students and
staff which might be in the building at any given time, and can be used to indicate Design Capacity.
2-9
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