The Plank House

Published on February 4, 2014 by Amy

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Tlingit Plank House
Tlingit Plank House

The indigenous people of the Pacific Northwest constructed their homes, a plank house from the cedar tree.
The American Heritage Dictionary defines longhouse as “a long communal dwelling, especially of certain Native American, Polynesian, and Indonesian peoples.” The homes commonly called longhouses, with regard to the Pacific Northwest, are plank houses, not longhouses. A plank house may be long, and may be commonly referred to as a longhouse, but it is not a longhouse. The cladding and roofing are planks of cedar, thus plank house.

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Material

Due to the nature of this building material, the anthropological documentation for these people is not widespread. The manner of wood harvest and continued use of that harvest was purposeful and sustainable. Native people of the Pacific Northwest maintained a distinct respect for cedar and the gifts cedar has given to many generations.

Cedar logs comprise the primary support system of the plank houses of the Pacific Northwest Indians, and are clad with thick cedar planks harvested from living trees. The cedar trees that had been harvested in a sustainable method, for their timber, are now gone or protected from timber cutting by federal designation of park or are on tribal land. The practice of leaving the tree was not the way of the new population. The timber industry logged for profit and did not leave trees for future harvest. The original inhabitants of the Olympic Peninsula had a respectful eye on the future and selectively harvested boards from a living tree.

The properties of cedar trees include straight grain, very few knots, and weather resistance. The straight grain enabled separation of planks of wood from the tree. The skilled people inserted a wedge to separate a section of wood and followed the height of the tree and adzed it out at both ends. This harvest method was sustainable and enabled the people to use the wood and to have a supply of planks to rebuild in another location. The patience of the people is evident in the practice of leaving the wedge in place to continue the pressure that would enable another wedge placement further up, this created longer planks.

The oldest found plank house village is located in Kitselas Canyon at the Paul Mason Site in western British Columbia, CA. This village is estimated to be 3000 years old. There has been a fire pit associated with a single house situated on the Maurer Site (on the Fraser River) that has been dated to approximately 4000 BP.

Construction

Canadian anthropologist Wilson Duff quotes Simon Fraser who (upon observation of the Coast Salish homes on the banks of the now named Fraser River) wrote in his 1800 journal; “as an excellent house 46 x 32 and constructed like American frame houses; the planks are three to 4 inches thick, each plank overlapping the adjoining one a couple of inches; the post, which are very strong and crudely carved, received across beams; the walls are 11 feet high and covered with a slanting roof. On the opposite side of the river there is a considerable village with houses similar to the one on the side.” Kenneth Ames, contributor to “Life in the Big House; Household Labor and Dwelling Size on the Northwest Coast,” calculates the volume of wood in this house to exceed half a million board feet (1,200 m³). One house, a multi family dwelling, found in Nanaimo, the eastern coast of Vancouver Island, Canada, is documented as being made of split cedar planks that were “held in place by withes (cedar rope) that come from the long lower branches of Cedar trees that grow in open spaces.” (Fraser)

The cedar ropes that secured the planks to the uprights and beams allowed the people to deconstruct their homes and bring their planks with them to the next location. These planks were not small nor were they easily obtained, but they were valuable assets and as such, they were transported with the household goods during the seasonal migrations. The house frames were left intact until the next season when the people returned and reattached their traveling planks and reconstructed their home.

There were two distinct roof types found in this region. Both types are on a rectangular house that has a hearth or fire pit. One type is gabled, paired ridgepoles, vertical wall, and roof, planks with an interior pit that was reached via steps. On Vancouver Island in around Puget Sound, Captain James Cook described the shed roof structures. His description is that of a cruder type building that may have been in the adaptive stages of the house type that may have been brought to the coast by the Salish people who modified as needed with the changed location. These shed roof houses are the largest constructed anywhere in this region.

The articles that have been written by anthropologists describe the shed roofs as being shed type that are not consistent in description as to the roof pitch. One informant will state that the roof was slanted to the back of the house, and another will say it was pitched to the front, or the side of the house. The question may be answered by thinking about the direction of the rain; the pitch is away from the rain. The roof pitch was adjusted according to the direction from which the rain comes down. Regionally, the rain comes from the south.

During his third mapping voyage, 1778, Captain James Cook described the homes he saw at Nootka Sound as not having a door. He described irregular openings through which the Indians passed in and out. The “Old Man House” had a maze “consisting of a series of parallel walls partly uncovering each other, around which the visitor had to pass.” The maze ended in a dark area that housed the fire pit. One explanation for this configuration was as a defense against intruders. Military strategy states that this would be a very difficult position to defend, and once the enemy was inside they could set it on fire with great ease. A more logical explanation lies, again, with the weather consideration. The lack of doors and the cedar mats room dividers did little to keep the wind and rain out, and in all probability, the mats served as windbreaks. The indigenous people lived, worked, and understood the weather; it was integral to their lives and their livelihood.

Anthropologist Ronald Leroy Olson, whose subjects were the Quinault, Tlingit and Kwakiutl tribes, defines the coasts of the Pacific Northwest as the place for rectangular plank houses. The coastal region of British Columbia to the mouth of the Copper River in Alaska with one exception; the Athabascan Tseutsaut of the head of Portland Canal who used temporary brush and bark lodges. The Alaskan people are more likely to use spruce wood, which has characteristics similar to cedar, due to the availability of that resource. Cedar was the material of choice for the coastal people of southwestern Canada, and Washington, Oregon, and Northern California.

Other uses

A historic type of house construction also called plank houses, widespread in North America, with structural, exterior sheathing thicker than one inch. The vertical wall planks are often two inches thick and more than ten inches wide and support a roof framing system. Sometimes with mud or daub packed into the gaps between the planks. The planks can be pinned with wood pins, nailed or mortised onto the top and bottom timbers. Of European origin to North America, somewhat related to Stave Churchs.

Source: wikipedia

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