What does a visual inspection of building services look like?

Here's an example of a KCL inspection of the 'as-installed' services.

We are looking for their seismic compliance with respect to the current New Zealand codes.


Relevant Codes

Our inspections of Building Services are based on the seismic restraint requirements stated in the following New Zealand codes:

AS/NZS 1170.0:2002 – Structural Design Actions – General Principals
NZS 1170.5:2004 – Structural Design Actions, Earthquake Actions – New Zealand
NZS 4219:2009 – Seismic Performance of Engineered Systems in Buildings
NZS 4541:2013 – Automatic Fire Sprinkler Systems

 

Marked up inspection photos:


RM 15. Refrig pipes to be braced at right hand elbow. 2 way. Note in this instance the pipes are too far from the bulkhead for the bulkhead to be braced to. Brace to soffit only at right hand elbow.


Duct is braced at 1 end only (2-way) & requires transverse brace at other end as pictured.

For recently installed services still lacking bracing (not installed yet) please carefully regard the following advice:

Brace pipes/ducts near the elbow, not more than 600mm from the elbow junction. This will allow the brace to act for both directions of the service.
Pipework should not be hung with hangers more than 150mm long to avoid the need to brace the service.
For rigid ducting, with greater than 200mm hanger length provide at least 1x 2-way brace as per KCL details. Typically these very short runs viewed in the tenancies (< 1.2m long) a single, 2-way brace is sufficient. Where the duct is more than 1.5m long overall, the duct should have 2x lateral braces, (1 at each end, and 1 of which shall be braced longitudinally as well. (2-way brace)).
The bulkhead wall in most cases will be easier to brace to than the soffit, but this is at the installers discretion.
Please ensure clearances are maintained as per this table. NZS4219 part 5, Table 15
For the purposes of this table, restrained = braced.