expected to receive a maintenance overcoat.
**************************************************************************
Apply coatings at the following specified thickness:
Desired Thickness Range
Minimum
Maximum
Coat
Mils DFT
Mils DFT
Mils DFT
Primer
3-5
3
8
Intermediate
3-5
3
8
Top
3-5
3
8
Total system
-----
9
20
Measure coating thickness in accordance with SSPC PA 2 to confirm that
coating application is within the specified range and within the tolerances
of that standard. For non-compliant areas, increase number of test areas
to identify all non-compliant application as required by SSPC PA 2. Add
coating as required to correct underruns, and remove coating with excess
thickness to bare steel and reapply as specified in Article entitled
"Procedure for Holiday and Spot Repairs of Newly Applied Coating."
3.9.2.1
Application of Roof Joint Sealant
Apply sealant to the roof-to-shell joint, to all roof plate lap joints, and
to roof-to-rafter joints up to 15 mm 0.5 inch gap to exclude moisture from
these marginally prepared crevice areas. Allow sealant to cure according
to manufacturer's instructions prior to application of the stripe coat.
3.9.2.2
Application of Stripe Coat
Apply stripe coat of epoxy primer material prior to application of general
primer coat on CEILING. Apply stripe coat of epoxy intermediate coat
material after application of general primer coat on BOWL. Where stripe
coat is applied to areas of joint sealant, allow appropriate curing time
for joint sealant. Apply stripe coat by brush, working the material into
corners, crevices, pitted areas, and welds, and onto outside corners and
angles. Where roof-to-rafter joints exceed 15 mm 0.5 inch gap and roof
joint sealant was not applied, use appropriate application tools to provide
"best effort" coating of all exposed steel surfaces in the gap.
Mini-rollers or other tools may be required.
3.9.2.3
Application of Primer
Apply primer coat within RECOAT WINDOW of stripe coat.
3.9.2.4
Application of Intermediate Coat
Apply intermediate coat within RECOAT WINDOW of primer coat.
3.9.2.5
Application of Topcoat
Apply topcoat within RECOAT WINDOW of intermediate coat.
3.9.3
Holiday Testing
No sooner than 48 hours after application of the topcoat, perform holiday
testing in accordance with the low voltage wet sponge method of NACE RP0188.
Repair holidays per paragraph entitled "Procedure for Holiday and Spot
SECTION 09972
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