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Relighting South Manitou Island Light

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Postby Grover1 » Sat May 16, 2009 6:46 pm


From The Holland Sentinel

http://www.hollandsentinel.com/lifestyl ... once-again

Image
(Photo/Traverse City Convention and Tourist Bureau)
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Postby CHUCKX53 » Mon Jun 08, 2009 2:43 am


Was out there last August with Mac McFarland, a fellow lighthouser from PA -- Was an excellent day -- At the time everything was in place - wiring, etc. - Just waiting on the Lens Installation -- Mac & I were given a tour of the Keepers Quarters -- A bit messy still, but Interesting, in particular the way the chimmey makes a weird bend up through the top floor -- Does anyone know of a reason for that ??
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Postby Terry_Pepper » Mon Jun 08, 2009 6:30 am


The chimney in the South Manitou dwelling is rectangular in plan, and is considerably wider in one dimension than the other. Its longer dimension is oriented in line with the roof ridge. Were the chimney to go straight up through the roof, it would not fit between an adjacent pair of rafters. Because of high snow load conditions in the winter on the island, there would need to be considerable bracing installed to ensure roof integrity with two adjacent rafters thus compromised.

In order to allow the chimney to exit between two existing rafters, the masons incorporated a 90 degree spiral into the structure within the attic space so that it penetrated the roof with its longest dimension oriented at 90 degrees to the roof ridge, thereby allowing it to pass snugly between and adjacent pair of rafters.

Here's are a couple of cross section drawings of the South Manitou dwelling which better illustrate the problem which was avoided by incorporating the spiral in the attic.

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Postby CHUCKX53 » Mon Jun 08, 2009 4:12 pm


Thanks Terry -- that is a perfectly logical explaination -- and the pictures helped !!
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Postby Grover1 » Tue Jun 09, 2009 4:14 am


Cool, Terry ... thanks!
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Postby NoahG » Tue Jun 09, 2009 11:25 am


I can only imagine the skill with which those masons did their job, and with no computers or CAD to help!
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Postby ericlighthouse » Tue Jun 09, 2009 6:44 pm


Terry the drawings helped a lot.
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