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Answer :
When penetrating a concrete fire-resistive wall or floor assembly with Rigid Metal Conduit (RMC) for electrical wiring, it is generally not acceptable to use mortar to fill the annular space around the conduit. Instead, firestop materials specifically designed for this purpose should be used.
What happens when penetrating a concrete fire-resistive wall or floor assembly with rmc
Firestop materials are designed to prevent the spread of fire, smoke, and hot gases through penetrations in fire-resistive walls or floors while maintaining the fire rating of the assembly. These materials are tested and approved for their fire resistance properties and are applied in accordance with local building codes and standards.
Using mortar or other non-approved materials can compromise the fire resistance of the wall or floor assembly and may not meet safety regulations. It's essential to follow the specific firestop requirements and guidelines applicable to your local building codes and standards when working with fire-resistive constructions and electrical penetrations.
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Rewritten by : Jeany
This statement is not true
There are two main categories of fire-resistance-rated
assembly penetration: Membrane penetration and through-penetrations. Items
through penetration pass completely through the fire-resistance-rated assembly.
As compared to many other codes provisions, requirements for
through-penetrations have their exceptions.
For example, IBC allows penetrating
pipes of steel in fire-resistance-rated walls to have the annular space which
is the gap that exist between the penetrating item and the floor or the
surrounding wall filled with concrete, mortar in masonry or grout.
There are two main categories of fire-resistance-rated
assembly penetration: Membrane penetration and through-penetrations. Items
through penetration pass completely through the fire-resistance-rated assembly.
As compared to many other codes provisions, requirements for
through-penetrations have their exceptions.
For example, IBC allows penetrating
pipes of steel in fire-resistance-rated walls to have the annular space which
is the gap that exist between the penetrating item and the floor or the
surrounding wall filled with concrete, mortar in masonry or grout.
