Class Lecture 06

April 7, 2011

Construction drawings

What kind of drawings are included in the cd sets?

Floor plans communicate:

Building configuration

Partition types

Dimensions

Information with notes and labels

Fixtures

Mill work

To scale 1/8” or ¼” Typ.

Demolition information

Enlarged plans communicate:

Information that doesn’t fit at scale of floor plans

About spaces with substantial detail

Information that is not included elsewhere

Typical for stairs, toilet rooms, elevators, lobbies, kitchens,

Interior elevations:

Configuration of walls plus vertical elements

Vertical dimensions (not plan dims)

Location of wall elements, like switches, receptacles, thermostats, etc.

Elevations of panels systems, mill works, etc.

At scales of ¼”=1’ and larger TYP

Information with notes and labels

Section cuts through elevation boundaries

Sections and details communicate:

Relationships of different materials

Horizontal or vertical relationships

Relationships of different systems

Elements beyond section cut

At scales of 1”=1’ and larger TYP

Not all details are sections, not all sections are details

Schedules:

In tabular form

LOTS of information efficiently

Specific attributes of the design

Elements beyond section cut

Typ. Schedules are finish, partition, door, hardware, equipment, millwork, paint

Specifications = talking to manufacturers plus contractors

Project manual includes:

Bidding requirements (if bidding)

Supplements to bid forms

Contract forms

General + supplementary

Bidding requirements:

Invitation to bid

Prequalification forms

Instructions to bidders

Information available to bidders

Bid forms

Types of technical specifications:

Prescriptive (closed)

List “exactly” what product or material should be

Ensure that you get what you want

Eliminate competitive bidding

Restrictive, not generally used for public or bid projects

Proprietary specifications:

Most restrictive specifications

Call out specific manufacturer’s product

Provide designer with complete control

Do not give contractor options

Specific materials might be expensive or have long lead times

Base-bid (equal) specs:

Call out proprietary (base bid) products

Allow contractor to provide substitutions

Variation #1 – specs list approved manufacturers

Variation #2 – specs include “or approved equal” language

Allow for competition and bidding

Performance (open)

List what kinds of results the finished assembly shouljd achieve

Provide contractors with choices

Descriptive specs:

Give detailed written descriptions of workmanship, quality, fabrication, and installation

Difficult to write, due to how complete the description has to be

Reference Standard Specs:

Provide description of material, product, or process based on referenced standards

Performance specs:

Provide descriptions of criteria and results:

Used when designer wants to encourage new ways to accomplishing performance

Difficult to write

Specifier must write an unambiguous document

What skills are required for pulling together specifications?

This class we learned what each type of drawing includes, from floor plans to enlarged floor plans. The skills necessary include being able to draw the plans to a typical scale and have them legible to all designers. We learned about different types of specification sheets and what needs to be included on each.