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                  TG No. 144                                                            August 1987

                                                      APPENDIX D
                                  SPRAY BOOTH INFORMATION AND EVALUATION METHODOLOGY

                  D-1. Spray booths or spray rooms must be constructed of noncombustible
                  material (29 CFR 1910.94, and 29 CFR 1910.107). Spray painting with CARC
                  and/or PUP and other dual component coatings should only be conducted in spray
                  booths meeting the requirements of 29 CFR 1910.107 and other appropriate fire,
                  safety and health regulations.

                  D-2. Airflow determinations should be made when the booth is empty. Airflow
                  should be determined by dividing the cross-sectional area of the booth into 16
                  equal areas.   This should be located in the middle third of the booth or where
                  the majority of the painting is performed. Anemometer readings should be
                  taken in the center of each of these areas. These 16 values are averaged to
                  obtain the mean feet per minute flow through the booth. This value is
                  compared with the established requirements in appendix G or 29 CFR 1910.94.

                  D-3. With down-draft booths, the same procedure is used except that the floor
                  area is divided into 16 equal areas. Anemometer readings are taken 4 feet
                  above the floor In the center of these areas. These 16 values are averaged to
                  obtain the mean feet per minute flow through the booth. The airflow
                  requirements for down-draft booths are the same as for horizontal flow booths.

                  D-4. Paint booths or paint rooms should be under a slight negative pressure,
                  0.05 inch of H20 gauge, or greater as long as negative pressures do not
osings are affected.

                  D-5. Make-up air into the booth should be Introduced in a manner which will
                  provide uniform flow through the process areas and should not be introduced at
                  velocities greater than 200 feet per minute (ANSI Standard Z9.3-1985 @nd 2q
                  CFR 1910.94). Airflow patterns can.be observed by using smoke candles or
                  smoke tubes.

                  D-6. Make-up air should be heated if outdoor temperatures are expected to
                  remain below 55 OF for appreciable periods of time during operation, except
                  where adequate and safe means of radiant heating Is provided. When heating is
                  required, the replacement air will be maintained at not less than 65 OF at the
                  point of entry into the spray area. Alternately, the building in which the
                  spray area is contained may be maintained at 65 *F. (See ANSI Z9.3-1985 and
                  29 CFR 1910.94).











                                                         D-1
Box ID = BX000000
Unit = VII CORPS       
Parent Organization = ARCENT          
Folder Title = PORT OPERATIONS CARC PAINTING POLICY                                                            
Subject = ARMY REGULATION 11-34 (RESPIRATORY PROTECTION PROGRAM
Document Number =        103
Image file name = 00000194.tif

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