Specifications

Status: Released
Version:2.2
Document: ITS-AVS Audio Visual Standards
V2.2Issued.docx
Author: Dean McFadden
Save Date: 25/08/2014
Page 17 of 63
2.8.3 Existing Structures
Obtain approval for penetrations through existing structures.
2.8.4 Sleeves
Fit a UPVC sleeve for each penetration through lowermost floor slabs, floor beams and external walls for
cables not enclosed in conduit.
2.8.5 Penetration Size
Provide a penetration of diameter 10mm greater than the pipe or sleeve diameter for pipes and sleeves
penetrating existing external walls, lowermost slab, or floor beams.
2.8.6 Sealing
Seal penetrations around conduits and sleeves with a weak sand: cement mix, or similar sealing compound
approved by the Principle. Seal the space between cables within sleeves with a pliable waterproof compound.
2.9 Acoustic Penetrations
2.9.1 Requirement
Acoustically seal penetrations for cables, conduits, ducts and busways passing through acoustic rated floors
and walls to maintain the acoustic properties of the floor or wall.
2.9.2 Materials
Submit details of each type of acoustic seal system proposed. Provide a cable transit system of approved
manufacture and acoustic properties where required.
2.9.3 Skirting Ducts
Provide acoustic treatment to skirting ducts where passing through acoustic rated walls as specified above.
2.9.4 Multi Cable Access
Where multiple cables are required to pass through the acoustic barriers enclose cables in a 1.6mm thick sheet
steel enclosure packed with 32 kg/m
3
insulation. Seal the duct to the acoustic barrier with a flexible sealant of
specific gravity 1.5 or greater. Design the access duct to have at least one 90
o
bend prior to penetrating the
acoustic wall. Elsewhere, wrap cables in 4.5 kg/m
3
‘loaded vinyl’ faced with 25mm thick insulation sheet and
seal to the acoustic barrier with flexible sealant as specified above.
2.9.5 Single Cable Access
Where single cables are required to pass through acoustic barriers, repair penetration and seal the cable to the
acoustic barrier with a flexible acoustic rated sealant.