Steamboat, Colorado
Here is an unique project that occurred in Steamboat , Colorado.
Initially we were presented with some rudimentary conceptual sketches of a floor plan and side view elevations of a “ski chalet”. These rough plans help us understand what kind of areas the beams need to span. We then are able to start planning possible post locations within the plan. Often at this point we realize the floor plan may need to be adjusted to accommodate a sensible frame plan. Being involved early in the planning stages helps immensely as there is still a certain amount of flexibility available form each party. Early involvement also allows for a frame plan that compliments the floor plan, is easier to cut and erect and ultimately costs less..
Project Phases
This particular project presented various interesting challenges. A 20' x 38' “great room” was desired which included a living, dining, and kitchen area, yet have no posts interrupting the spaces. Initially, an impressive set of 38' timber trusses were desired. This seemed ambitious especially when height restrictions forced the roof to get quite flat. A “5/12” roof pitch would keep it low enough yet the snow loads in Colorado are quite high. Combining the huge clear span, a relatively flat roof and huge amounts of Colorado snow was a reckless proposition to say the least.. The alternative plan we suggested was to span the 20' direction instead with two parallel chord “bridge” trusses. This solved the loading issues for supporting the flat roof. The “bridge”trusses also brought in a slightly contemporary design element the clients liked. A complete frame plan now was presented satisfying most needs yet the projected cost now seemed out of reach for the client. We then presented the idea of a “hybrid” structural system where the central core of the house was timberframed. Common rafters would span from this central core to an exterior wall system of “structural” stress skin panels. (stress skin panels are also what provide the house with super efficient insulating enclosure)
The new plan allowed for the house to retain its post and beam theme and the cost of the frame was reduced substantially. The plans were reviewed by the local engineer and approved. The clients gave the “thumbs up” and the timbers were ordered.
Three weeks later timbers arrive on site.
We decided to approach this project” as a “working vacation” as we were all avid skiers. Cutting this frame on site also saved a substantial amount on shipping Douglas fir timbers around the country. The client appreciated this, of course. Most of the joinery occurred on the main deck of the house. Fortunately Colorado's' reputation for sunny weather held true and the joinery progressed quite efficiently. On days of inclement weather, we worked in the basement on the smaller timbers. Within four weeks we had all the joinery done, timbers finish-sanded and oiled. The timbers were then assembled into large sections we refer to as “bents”. We try to assemble as much as possible on the ground before a crane arrives for raising day.
A perfect day to raise the frame. The final ridge assembly is flown in. The upper common rafters were next. Only the central core was timberframed. Steamboat resort can be seen in the background. Nice place to work, eh?
Now the stress skin insulation panels are fit in place. These structural panels will support the lower common rafters to be placed later. A "hybrid" house.
A steep hill-side site to say the least.
