


        ELVAC USER INFORMATION 

        1) INTRODUCTION

        ELVAC (Elevator Evacuation) is an interactive computer program that
        estimates the time required to evacuate people by use of elevators.
        It is cautioned that elevators generally are not intended as a
        means of fire evacuation, and they should not be used during fires. 
        However, it is possible to design elevator systems that for fire
        emergencies, and ELVAC can be used to evaluate the potential
        performance of such systems. ELVAC calculates the evacuation time
        for one group of elevators.  If a building has more than one group
        of elevators, ELVAC can be run on each group separately.  Input
        consists of floor to floor heights, number of people on floors,
        number of elevators in the group, elevator speed, elevator
        acceleration, elevator capacity, elevator door type and width, and
        various inefficiency factors.  The output is a table of elevator
        travel time, round trip time, people moved, and number of round
        trips for each floor plus the total evacuation time.  ELVAC was
        written in compiled BASIC by John H. Klote and Daniel M. Alvord.

        This disk contains the program executable and source files and a
        document file for the ELVAC program.  For program documentation and
        a description of the input data, the user should refer to the
        ASHRAE Smoke Control Manual (John H. Klote, Daniel M. Alvord, and
        Scot Deal "Routine for Analysis of the People Movement Time for
        Elevator Evacuation,"NISTIR 4730, November 1991, Prepared for the
        General Services Administration, Fire Protection Engineering
        Branch, Washington, DC 20405 by the U.S. Department of Commerce,
        National Institute of Standards and Technology, Building and Fire
        Research Laboratory, Gaithersburg, MD 20899). 

        2)  ELVAC FILES

        The following files pertain to the ELVAC program

        Files on DISKV01

        ELVAC.EXE     The compiled form of the ELVAC program
        ELVAC.BAS   The BASIC source code for the ELVAC program.
        DISKV01.TXT    This text file.
        READV01.BAT    Batch file to display file DISKV01.TXT one screen at
        a time.
        USERINFO.TXT   General user information.

        Files on DISKV02

        ELVAC.DOC     The documentation for the ELVAC program in Word
        Perfect 5.1 format.
        DISKV02.TXT    This text file.
        READV02.BAT    Batch file to display file DISKV02.TXT one screen at 
        a time.

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        USERINFO.TXT   General user information.


        2.1)  ELVAC.EXE

        The executable program file, ELVAC.EXE is included on the disk.
        This program may be run directly on computers without a BASIC
        compiler.  ELVAC.EXE requires approximately 95K free random access
        memory and will run with or without an 8087, 80287 or 80387 math
        coprocessor. The program file has been compiled with a Microsoft
        compiler and portions are subject to copyright by the Microsoft
        Corporation.   The program source files are contributions of the
        National Institute of Standards and Technology and is not subject
        to copyright. 

        2.2) ELVAC.BAS

        For users who wish to modify the program, the BASIC source code is
        included in file ELVAC.BAS.   All BASIC compilers are not the
        same.  As a result, this program may not compile with all versions
        of BASIC on the market.   ELVAC has been compiled successfully with
        Microsoft Quick BASIC version 4.5.

        2.3) ELVAC.DOC

        A Word Perfect 5.1 document file has been included on the disk as
        ELVAC.DOC.  A word processor format has used to permit the
        inclusion of equations, tables and figures.

        3) PROGRAM USE

        To run the program type ELVAC followed by a carriage return. If the
        program resides on other than the designated disk drive then add
        the drive/path name, for example B:ELVAC. 

        4) REVISION HISTORY

















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