Jane Griswold Radocchia

 

Architect / Geometer / Historian

 

 

 

Jane Griswold Radocchia

 

 

Architect - Geometer - Historian



 

 

Hello

 

Jane Griswold Radocchia is an architect.

Jane studies practical geometry and vernacular architecture.

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Below are some of her latest blog posts, some others can be found on this web site's Archive



 

Jane Griswold Radocchia

Jane Griswold Radocchia


Jane Griswold Radocchia

Jane Griswold Radocchia



 

Coming Events

 

Practical Geometry workshop,
MUD University,
Cambridge, NY,
Feb 25. 1-3 pm

North Bennet Street School,
Boston,MA,
March 12-14,
workshop

 

----------------- Most Recent Article -----------------


 

Monday, November 20, 2023

 

The Practical Geometry of the Parson Barnard House:
the Bents


 

This is the second part of my study of the use of geometry in the layout and design of the Parson Barnard House, in North Andover, Massachusetts.


Here's the house. The left section, the 'front', was built in 1715; the saltbox added in 1720. The rear extension to the right came in the 1950's.


For my first post on the Parson Barnard House please see the link at the bottom of this page.*

 




 

The first floor plan shows the 2 back wings. The middle section, labeled kitchen, back hall, and study is the 1720 saltbox addition. The laundry and entry spaces were added 230 years later.





 

The plan shows a step down into the saltbox addition.




 

The side elevation also shows this step down. The dashed lines locates the floors and the step down.




 

The layout Lines locate the inside edge of the posts and the inside width between the posts on either corner of the house. Together they outline 3 sides of a rectangle, the layout for the bents of the frame. The radii of the arcs is the width of the frame. They cross at the placement for the lower side of the beam which supports the attic floor joists. It is the upper beam of the bents that frame the house.

This use of geometry matches the way the parlor width was determined. The thin black Line marks the rectangle which is the inside of the bent.




 

The rectangle from that layout crossed with its diagonals. Where the Lines cross is the height of the beam which carries the second floor joists.

*See note below for more information.




 

For reference here is the geometry of the first floor plan with the Hall on the right, a square; the Parlor on the left, a rectangle whose width is laid out by the arcs. This geometry is laid out from the inside edges of the posts.




 

When the same geometry is used to lay out the bent using the width from the outside of one post to the other as the dimension, the crossing of the arcs is at the upper side of the attic beam.

**Look back at the elevation of the house with the rectangle derived from the interior dimensions. Note that the second floor and attic windows - which appear to be original - are centered on the space. Using the outer dimensions the windows are no longer centered.




 

Here is the design for the 6 bents for the Parson Barnard House (without the braces). This simple layout requires only basic knowledge of Practical Geometry.

The bottom red line is the sill.




Do the layout differences I've shown here - between the use of the inside and the outside widths - provide evidence that the interior widths were used? Or do they simply mean the drawing is too small, my lines too thick or not perfectly placed, that the attic framing might yield other information for an accurate assessment?



* The Practical Geometry of the Parson Barnard House







 

Architect

 

As an architect based in Bennington, VT. and Andover, MA. I work with old houses and the families who love them.

For 40 years I have helped owners restore, repair, renovate and expand their houses.

During this time, I have worked with over 1200 houses, some modern, some 300 years old.




Historian

 

I am an architectural historian by accident. I found I was showing friends and clients the historic environment they lived in but did not see.

Writing a column in the local newspaper, Sunday Drives, gave me my voice. I enjoy sharing what I see; so I give lectures and teach seminars.

I know from my work as an architect how available materials and technology influence design and construction.

I am most interested in vernacular architecture, how we built to suit our climate and our needs using the tools and materials we had.





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Blogs

Architecture  (Current Blog)


Passing By  (Original Blog)


Sunday Drives  (Original Blog)


 

Comments / Reflections

Mary said...
Thank you so much for this lovely article. This church was well loved & had at least a dozen families attending when it closed down. It is sad to see it be torn down, instead of being preserved as a community space. The one blessing is that we can finally see the beautiful architectural elements you describe, which were hidden to all of us by the drop ceiling. Lovely that the church still stands in this elemental fashion for a few more months. More