NZS 3604:2011 Timber-framed buildings does not define stud length or height. This is creating some confusion, especially when continuous studs for chimneys or parapets pass intersecting framing. BRANZ has some advice.
Selection tables Selection tables have been rationalised and the number reduced. Light and heavy roofs are combined in one table, and the extra-high wind zone is the default requirement with...
A common feature of many leaky buildings is that they were constructed without eaves, usually with walls terminating with a parapet. Changing this design detail can greatly enhance a building’s weathertightness.
MANY ARTICLES IN BUILD and elsewhere have focused on precautions necessary to avoid roof failures in high winds. These have ranged from retrofitting fixings to durability of screw fixings. NZS...
A single, boron-based treatment class, H1.2, may now be used for almost all enclosed timber framing. This has simplified framing timber, but have treatment processes or on-site handling changed?
As the dust settles after the introduction of the revised H1 requirements last year, BRANZ has continued to receive a steady stream of related queries about the ventilation of residential dwellings – especially roof spaces.
Jack studs and bottom and top plates must be solid timber members, but NZS 3604:2011 lets other solid timber members be replaced by built-up members. However, these need to be done correctly.
While the use of dragon ties in New Zealand residential construction has decreased over recent decades, they remain a simple and cost-effective method to provide bracing solutions to larger rooms. However, BRANZ helpline queries suggest there is still some confusion around when they should be used.
Using 140 mm framing in external walls allows for a better insulated, warmer home and has practical advantages on the building site too. There are different requirements for 140 mm and 90 mm timber framing to be aware of.
You could be forgiven for getting the wind up about wind speeds, pressures and zones, but don’t worry. Here, we go back to basics to explain how they relate to one another.
NZS 3604:2011 permits the use of built-up members, except for jack studs, bottom plates or top plates, which must be solid timber. However, there are a few rules to follow.
There seems to be some confusion around selecting lintels and deciding if uplift fixings are required using NZS 3604:2011 Timber-framed buildings Table 8.14, so grab your copy of NZS 3604 and work through the steps.
A high proportion of residential buildings use timber nail-plated roof trusses to form the roof structure. NZS 3604:2011 includes provisions for their use.
The correct fixings are needed at the various junctions of a timber-framed building structure to resist uplift in windy conditions. In this article, we summarise where to find them in NZS 3604:2011 and what is required.
There are a myriad of fixing types and finishes available. Selecting the right fixing for the location is critical to the ongoing performance and durability of the building.
