Oregon Caves Historic Structures Report

PART IV
Exterior Assessment and Recommendations (continued)

Brackets, Verge Boards, and Purlins

The roof structure is complemented at the exterior by the existence of log brackets, verge boards, and log purlins. These elements serve both a decorative and functional purpose throughout the building.

Gable end bracket, northwest gable.

The log brackets are present in the eight major gable ends. These are either peeled or unpeeled, depending on the location. The brackets are nailed to a 2" x 6" board that is bolted to the building's wall structure. A diagonal member runs up from the base of the board to support a horizontal member, forming a triangular bracket. The brackets extend approximately six inches past the outside edge of the verge board. As a result, all of the horizontal Gable end bracket, northwest gable members have rotted at the end away from the building that is exposed to the weather. While they serve but a small structural purpose, they are critical decorative elements of the Chateau.

Typical decay of gable bracket end.

The rot at the ends of the brackets extends back toward the building past the intersection with the verge boards. The brackets and verge boards are notched to accommodate one another, and water is allowed to puddle at this point, decaying both members. This intersection is also directly above the intersection of the diagonal and horizontal members of the bracket. The end grain of the diagonal member is vulnerable at this point, and in some cases the member has begun to decay.

Verge board and brackets.

The verge boards present at the gable ends is formed by 2" x 8" dimensional lumber. These members meet at the peak of the gable, and are painted a reddish color that slightly offsets the color of the Port Orford cedar bark siding. These members are compromised only where they intersect the brackets, and there are pockets of decay at all bracket intersections. These pockets vary in size and severity throughout the building. The paint on the verge boards has failed, allowing excess moisture into the boards.

Purlin and brackets, north side.

The peeled log purlins are present under the eaves, tying the rafters together. These members are painted to match the sheathing under the eave, and are in good condition throughout the building. They are supported by triangular brackets, and support the exposed rafter tails. The purlin brackets are peeled logs, left unpainted. The purlins are notched to receive the rafter tails.

Recommendations for Treatment: Brackets, Purlins, and Verge Boards

The brackets, purlins, and verge boards display various levels of decay. The purlins are protected from the elements, and as a result are in good condition. The brackets, on the other hand, have been subjected to the weather and require attention. The treatment of these three elements varies, but is consistent throughout the building.

• The horizontal members of the log brackets are all in need of replacement. Excessive decay has rendered them useless as structural elements, and has diminished their decorative importance. The brackets should be removed from the building with care in order to perform this work, so the historic siding will be protected. The diagonal members should also be inspected at this time, and the decayed members should be replaced. The number of diagonal members needing replacement will not be known until the horizontal member is removed and the end grain can be inspected.

• All verge boards suffer from a compromised paint coating. They should all be scraped and painted in situ, while the brackets are removed for repair. Any areas of decay at the intersection of the verge boards with the brackets should be repaired using a "dutchman" repair in which only a small portion of the board is replaced. This will protect the historic fabric from unnecessary removal from the building.

• The under eave purlins are all in good condition. These peeled logs must retain the integrity of their paint coating to remain useful to the structure. The paint should be inspected on a yearly basis and repainted as necessary.

These elements should be properly maintained to serve their limited structural function, and also because they are primary decorative elements of the Chateau.

orca/hsr/hsr4a.htm
Last Updated: 22-Sep-2001