welds prior to welding (except surfaces on which metal decking is to be
welded). Slip critical surfaces shall be primed with a Class B coating.
Prior to assembly, prime surfaces which will be concealed or inaccessible
after assembly. Do not apply primer in foggy or rainy weather; when the
ambient temperature is below 7 degrees C or over 35 degrees C 45 degrees F
or over 95 degrees F; or when the primer may be exposed to temperatures
below 4 degrees C 40 degrees F within 48 hours after application, unless
approved otherwise by the Contracting Officer.
2.7.2.1
Cleaning
SSPC SP 6, except steel exposed in spaces above ceilings, attic spaces,
furred spaces, and chases that will be hidden to view in finished
construction may be cleaned to SSPC SP 3 when recommended by the shop
primer manufacturer. Maintain steel surfaces free from rust, dirt, oil,
grease, and other contaminants through final assembly.
2.7.2.2
Primer
Apply primer to a minimum dry film thickness of 0.05 mm 2.0 mil except
provide the Class B coating for slip critical joints in accordance with the
coating manufacturer's recommendations. Repair damaged primed surfaces
with an additional coat of primer.
[2.7.3
[Fireproofing] [and] [Epoxy] Coated Surfaces
**************************************************************************
NOTE: Insert appropriate Section number and title
in blank below and format using UFC 1-300-02.
**************************************************************************
Surfaces to receive [sprayed-on fireproofing] [epoxy] coatings shall be
cleaned and prepared in accordance with the manufacturer's recommendations,
and as specified in Section [07810 SPRAY-APPLIED FIREPROOFING] [_____],
["_____"].
][2.7.4
Surface Finishes
**************************************************************************
NOTE: AISC states "finished" surfaces, where
identified, should have a maximum roughness of 500.
For pins and bearing surfaces, a maximum roughness
of 125, in lieu of 500, is recommended.
**************************************************************************
ASME B46.1 maximum surface roughness of 125 for pin, pinholes, and sliding
bearings, unless indicated otherwise.
]PART 3
EXECUTION
3.1
FABRICATION
**************************************************************************
NOTE: If bearing-type high strength bolted
connections are required, delete the painting
exception for contact surfaces of friction-type
high-strength bolted connections.
AISC fabrication plant certification is required for
SECTION 05120
Page 21
Previous Page
