Any pipe or conduit with a diameter smaller than the listed value may be used.
Any pipe or conduit with a wall thickness heavier than the listed value may be used.
Any cable tray with a width and / or loading depth narrower than the listed value may be used.
Any cable with similar insulation / jacketing and smaller size or gauge may be used.
A rated Firestop system “F” rating may be applied to a wall or floor of equal or lesser “F” rating, the system then is rated at the lesser “F” rating.
References to tested systems are as follows:
UL indicates Underwriters Laboratories, Inc. (US)
cUL indicates Underwriters Laboratories, Inc. to Canadian Standards (Canada)
FM indicates Factory Mutual Research
SP indicates Underwriters Laboratories of Canada
SWR indicates Southwest Research Institute
- ITS indicates Intertek Testing Services (formerly Warnock Hersey)
Nelson Product Abbreviations
||Silicone Non – Intumescent Sealant
||Latex Intumescent Sealant|
||Firestop Mortar Compound
||Multi – Cable Transit|
||Multi – Plug Device|
||Intumescent Fire Brick|
||Intumescent Cable Coating
||Pipe Choke System|
||Elastomeric Joint Coating