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Construction Meeting, Tuesday Sept. 13, 2011 Attending: Roy Earnest, Deirdre Helfferich, Hans Mölders, Mike Musick, Monique Musick (John Trigg Ester Library); Thorsten Chlupp (Reina Alaska); Mario Gho (UAF Interior-Aleutians Construction Trades & Technology Program); Gary Pohl, Matt Prouty (USKH). Informal discussion begun 6:07 (*no quorum for board meeting, board meeting rescheduled for next week, September 19, 2011) Library plans passed out by Matt Prouty - The site is not facing true south- noted by Mike Musick. There was room for re-orientation according to the solar survey and this layout fits the site better. The NE grade was a challenge so by swinging a little west there is room for the civil design elements (cistern, parking, paths, etc)
- Tank design- cheapest methods led to this design
- 50% final design right now
- Had to re-arrange HRV and storage room placement
- Estimated capacity for books (31,000)
- The shelves we got from Monroe, all 16 shelves, were the cost of just one shelf new
- The masonry heater will have two doors- visible from both sides
- The heater is true north-south on the plan
- The windows are oriented for maximum solar gain
How hot will it be at the circulation desk?- Roy asked. It’s not like a fireplace with a lot of radiant heat- warm but not too hot. When people walk in they will be drawn in by the windows and masonry heater. - Thorsten needs the final plans in order to calculate our thermal storage needs
- Tank designed to reduce cost- laid out for 4x8 sheets
- Right now we have about 10 M BTU heat storage potential
- Do we need a new soils test? No. We had frozen dirt at 24 ft.- not solid ice
- Do we need to be concerned about heat loss? We will bring in structural fill anyway- not a concern. There will be some super-heating of the soil, but there are no warning flags
- Everything is superinsulated: tank is R70, foundation R60, walls R70, roof R115
- Once we calculate the plan, window sizing may need tweaking- fine line between loss and input, insulation would be the next place for adjustment
- Insulated shutters are part of the calculations: with and without. Sliding shutters have been designed - using wall space storage for automatic shutters
Slanted roof area in the south provides a location for photovoltaic panels. The site analysis led Thorsten to think that incorporating the PV into the building design is better because of the height advantage. Need to watch the electric load. Lighting is the biggest draw. Wish to incorporate LEDs if possible- but they are expensive. T-5 base is much cheaper- standard florescent. Thorsten is not sold on LEDs because of price and problems--A two-year-old fixture that doesn’t work, for example. - South ceiling is 12 ft., back is 9 ft.
- Colors inside and surface choices will affect light dispersion
- Low stacks shouldn’t be a problem, but high stacks, especially in the corners, may need additional lighting - no dark corners
Mike Musick- would like to see the bike path extend to the west shoulder of the library property, connect the library to the park and bike path Old Nenana Hwy. is a state road, Village Rd. is borough - The trees south of the building need to be cut
- Silt from the excavation will be pushed over the south bank
- Some kind of erosion control would be needed, some terra forming, or hydro seeding
- A path down to the gazebo would be great
- Terracing or other joint projects with Calypso is a possibility
- An exterior welcoming space, such as planters, would be aesthetically pleasing and help capture water that isn’t directed to the gutters
- The cistern would help provide toilet water and outdoor water
- The septic will extend to the north east
- We do want a commercial sink (3-sink) but it doesn’t need to be big
Consulting on the HRV- the manufacturer’s contact in Seattle will review our plans. The manufacturer, Zehander, is from Germany and is eager to offer design help in order to get their product out. They are excited to work on this project. They are coming out with a new pre-heating unit that improves efficiency. Runs off a ground loop from around the building- captures some of the lost heat. - Need to determine if we need one or two HRV units
- A bigger unit has higher operating needs
- Commercial units are more expensive
- Two household units may be cheaper and more efficient
- There is an opportunity to have two zones for the two HRV units
- They are very quiet
- There are decibel limits on passive haus certified products
Construction estimates- rough estimate ~$800,000 - Does not include all of the details on materials choices
- Re-purposed materials can change the estimate dramatically
- Carpet is a health hazard within one year
- Concrete and cork flooring covers 90% of the space
There is an opportunity to incorporate an education element - The IAC students could do the truss building on site
- They need practicums
- Could also assist with some of the concrete work
The trusses can be designed with the students in mind - Straighten out the bottom line
- Why this truss design? Utilized previous elements compartmentalizing the spaces.
- We should simplify the truss and make it straight- all agree
We could custom build our solar heat collectors- requires sweating copper pipe - Off-the-shelf collectors would provide a tax incentive- 30%
- Build-your-own are 40% cheaper and incorporate into the roof structure
- Can custom build one big collector instead of 8 separate ones- more efficient
- Drain-back system- need 8 inches of tilt incorporated
- Hide the whole system with a glazing- high heat absorbing
- The final product is flush
- Requires a little deeper truss design
Interior-Aleutians Campus - Teach a voc ed program: carpentry. They have to work on something real
- There are a number of students in the Fairbanks area now; They want to work with us on the library
- Would coordinate their work with the contractors- not the design team
- Also have an alternative energy program
- Teach courses on thermal conversion
- It is possible to plan for a group that would understand the technology in the library
Other decisions: - No tiles in bathroom, concrete is OK there too
- No tacky plastic edging
- Seek sources of donated corrugated siding
- Gypsum board inside, ceiling and walls
- Custom build the front door- order locks from Germany
- 3’6” entry doors
- Fiberglass frame windows
- Final plans ready for October meeting
- A list of electrical considerations will be needed soon- everything electrical and its energy usage need to be tallied, including lighting decisions
- The only possible efficiency required design changes are the window sizes
Solar survey (see Solar Survey page online) - Question on acronyms- will send a key
- The green area represents trees- we need to clear a bunch
- The bottom line of trees must remain to retain the soil
- There are no major solar impediments for this site
- The site plan right now is an engineer on a computer with a topo-map, actual building practices give a little more wiggle room to orient the site.
All other business that would have been addressed at this meeting will be put off. Will do a special meeting next Tuesday instead. | | |
