| Tweet |
Custom Search
|
|
|
||
 TB 740-97-4
(4) Pressure sensitive tape. Where the tape is applied in flat strips to bridge openings, adhesive conforming to FED-MM-
A-189 will be applied to the boundaries of the area to be covered in order to improve the adhesion of the tape. Best results are
obtained of the tape if the tape is applied while the compound is slightly tacky. When applied to bridge openings, it will normally be
covered with strippable coating and bituminous coating, in that order.
(5) Strippable coating. Strippable coating will be applied by spraying to a thickness of approximately 0.040 inch, in order
to obtain good resistance to water vapor transmission. Seams, joint and small apertures can be sealed best by direct application of
the coating. Prior application of tape or suitable exterior grade plywood or metal blanks is desirable only for the sealing of apertures
too large to be bridged by the compound. Since strippable coating at best provides only moderate resistance to water vapor, it will be
overcoated with bituminous coating in all cases where it is desired to seal any opening of appreciable surface area for
dehumidification.
14. Preservation Time Period. a. Receipts from procurement and reconditioned stocks requiring a military level of protection will
normally be preserved within ten (10) work days after receipt of stock. If the prescribed level of protection cannot be accomplished
within the time frame specified, interim preservation will be afforded the item to keep it in an "as is" condition.
b. Serviceable and repairable stocks on hand including retrograde receipts will be afforded the required protection to keep
them in an "as is" condition. For the purpose of this publication, the term "as is" means affording the item the protection necessary to
keep it from further deterioration. This may involve application of preservatives; preservation of engines and other associated
components, painting, and in some cases the installation of dynamic dehumidification systems, if required.
2-3
|
||
|
||
