Appendix D - Design Narrative-Sept2012.docx

BASIS OF DESIGN NARRATIVE

Basis of Civil Design Narrative

a. Explanation of existing system, covering the type, capacity, condition, present water use and unsatisfactory elements of component parts for major extensions.

b. Statement of type of construction and materials for mains.

c. For distribution systems, statement of design, domestic and fire flow, residual pressure, and elevation differentials (should include designer's estimate of pipe sizes).

d. Statement of sizes, elevations, capacities, etc., as can readily be determined without long computations or design consideration for reservoirs, treatment units, pumping plants, well pumps, and such units.

e. Method for reducing water usage to comply with the Executive Order Jan 2007.

a. Explanation of existing system covering, in particular, the type, capacity, condition, present flow, and unsatisfactory elements of component parts for major extensions.

Storm Drainage:

A statement of the requirements for storm water management for the particular state in which the project is located (i.e. on site detention/point source discharge). Explanation of the design approach to be taken, including materials selection.

Environmental Site Issues:

A statement explaining known and potential site environmental issues such as wetlands, shoreline or drainage issues requiring special permitting.

Demolition:

A statement discussing proposed demolition of existing structures, suspected or tested hazardous materials, and special disposal requirements.

Basis of Architectural Design Narrative

Building Insulation:

Describe types of insulation to be provided with specific R-values for roof(s), walls, floor(s), etc.

Materials and Finishes;

Describe materials for all major items of construction including interior/exterior finishes.

Furniture, Fixtures and Equipment List:

List new and existing furnishings and equipment to be accommodated in the project.

Space Programming:

Provide the following:

a. Gross area calculations.

b. Net area for each room, verifying that room size is adequate for built-in and free-standing furnishings and equipment for the identified function.

b. Describe means for controlling water penetration and moisture migration through exterior walls.

c. Describe typical roof and wall sections.

LEED Checklist

Provide a copy of the preliminary LEED Checklist indicating design and construction items to be incorporated into the project to achieve the requirements for LEED Certification.

Basis of Structural Design Narrative

Basis of Mechanical Design Narrative

Plumbing Systems:

a. Estimated maximum and minimum water pressure

b. Availability/capacity of system connected into.

Heating, Ventilation, and Air Conditioning:

A discussion and description shall be provided for:

a. Calculated heating and cooling loads

b. Documentation of unusual temperature and humidity requirements

c. Ventilation rates

d. Discussion of areas to be conditioned and equipment locations/space requirements

e. Documentation of customer’s preference for the HVAC control system

f. Information on available energy sources/utilities.

g. Description of the selected HVAC systems and controls, including energy sources.

h. Special HVAC requirements (hazardous areas such as welding hoods, dip tanks, etc.)

Energy Conservation::

A discussion and description of proposed systems to manage energy consumption.

Miscellaneous Mechanical Systems:

Miscellaneous Mechanical Systems: Describe any special mechanical systems.

Basis of Fire Protection Design Narrative

Prior to the design of any structure, specific questions regarding fire protection must be raised in order to address the occupants' particular needs and acceptable levels of fire risk as avenues of egress and fire rated separations are all basic to the floor plan. It is essential that any answers about fire protection be reached as early as possible.

Type of Construction:

Clearly identify and describe the type of construction to be used as defined by the Uniform Building Code detailing the maximum fire area and separation of structures. Submit occupant loading and exiting calculations conforming to the NFPA 101 (Life Safety Code).

Basis of Electrical and Telecommunications Design Narrative

Primary Distribution:

Primary Service Transformation to Secondary Service:

Design Standards:

Provide a statement describing proposed pertinent standards of design, such as voltage regulation, lighting intensities, and type of lighting fixtures.

Appendix D –Basis of Design Narrative 1 of 5 Revised Sept 2010