THRU-JOIST™ brackets enable holes to be cut up to 121mm diameter in flooring joists to allow services to run through the mid floor and other enclosed areas, without affecting the strength and stiffness requirements of a joist under NZS 3604:2011 and AS 1684.2-2011 (For Radiata Pine up to and including stress grades F8).

  No limitation on where THRU-JOIST™ brackets may be installed along the length of joist.

  Multiple THRU-JOIST™ brackets may be used on the same joist (refer fixing note).

  Alternative BRANZ Appraised Solution to NZS 3604:2011 and Australian Standard AS 1684.2-2011.

  THRU-JOIST™ brackets are a very cost effective, simple to install building method to allow services to run through joists.

Bracket Max Hole size
140mm x 45mm
190mm x 45mm
240mm x 45mm
290mm x 45mm

  Fixing Notes

  CAD Files

  Comparison Chart