Bracing wall rod tie-down restraint not at capacity

Insufficient tie rod restraint

Tie down rods typically long M12 bolts (12mm threaded galvanized bar) can develop 27kN of force in pull-out tension during a severe design wind event.  This forces equals 2,752 kg of static load or approx 2.75 tons.  Taking this into consideration it becomes apparent that the top fixing pictured will not allow the tie down rod to reach capacity before its stud connection with a framing anchor (a thin galvanised metal bracket) at each ends will be torn out with only a few nails used for its fixing into the side of the adjacent joists.

The joist blocking correctly shown on the lower photo is the correct code method for the base restraint of a bracing wall tie rod. The rod incorrectly installed above can be extended with a nut extension coupler and a joint blocking piece added.

Roof framing damage from service installations

Installing a ducted air-conditioning system into a congested tight roof space is not a particularly easy task.  Most experienced builders are quite aware that the roof framing including trusses, battens and their connections are not to be damaged or compromised in anyway.

Air-conditioning installing contractors are however not usually licensed builders with a carpentry trade behind them.  This can result in a lack of respect for the integrity of the roof framing and damage if modifications are attempted "on the fly" by the air-con installers.

New Patio Roof added without wind tie-down improved at the house connection

New patio roof additions have become very popular in Australian cities. Stratco Outback, Spanline roofs and Altec Patios have been marketing the benefits of a covered outdoor entertaining space for some time now.

Unfortunately some of these systems and other more conventional patio roof extensions (as pictured) have not been designed/installed well to accommodate the additional roof sail area tie-down restraint forces required to keep the new roof in place during high wind storm events.

Poor site drainage and foundation movement

1mm wide wall cracking

Recent detailed structural inspections conducted for a home owner has discovered some adverse outcomes concerning BSA insurance cover for new homes within seven years from construction.

Insurances companies are always looking to provide some exit strategy on their coverage should the worse actually eventuate.  In this regard  the BSA assessors are bound to mirror similar attitudes.

Post corrosion resulting from exterior exposure and non-compliant steel coating protection

This is a significant emerging issue for houses built in the mid 1990's in South East Queensland.

In order to provide a reasonable design life structural elements must be maintained and or protected to achieve the nominal 50 years proscribed for domestic house built in Australia.