Ferrocement Photo Gallery

Ferrocement Photos


Parabolic Stress-Skin Projects


outside arch address.jpg

Parabolic Stress-Skin Home, Structures and Walls

22 files, last one added on Jul 12, 2006
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Random files - doug's Gallery
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Doug Lacy window & wall fill photos3384 viewsUpper Left -- This picture illustrates many phases at one time. A tarp was placed over the armature to protect thin shell cement from wind and sun for a better control of curing conditions. The sculpted windows were just mudded in and I was still formulating a mix and plan that would help the plaster stick over head which is why you see the hose attached to the inside of the arch. This hose was used as a screed point for the first few bands of concrete so the exact thickness could be gauged with some precision for the rest of the hand applied cement.

Upper Right -- This is just after the inside shell overhead plastering was complete. Fluffling the mix with the expanded Mearlcell 3132 a little made this overhead plastering stick without comprimising the strength of the shell. These seashell slice windows represent part of the Healing and Evolutionary Architecture theme I wanted to demonstrate in this home.

Lower Left -- This is the inside of the wall after I began filling it with cellular concrete.
lacy doug applying mix to wall.jpg
Plastering Armature2781 viewsAvelino and Zane plastering and Doug Smith stirring the mix. The bench details did not slow the guys down much.
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Sea Shell Windows Outside2513 viewsSeashell sculpture in windows on North East side to difuse indirect light into the upstairs room.
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Butress and Arch1979 viewsThis is an example of how the wall is stabilized. These butresses are also hollow but function just as well as a solid concrete one would.
curve armature Jana yard.jpg
Curve Armature2626 viewsThese long Stress-Skin Curves are provide more stability over a longer stretch than sharp corners.
bench butress clay stove.jpg
Bench Butress Supports2245 viewsThis bench and butress were designed to provide axel load reinforcing for the long straight walls to protect the wall from high winds.
lacy doug bending wire 1.jpg
Folder in Action2361 views
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Home on hill with clouds -- Chicken Coop??3468 viewsUpper Left --this is a finished dome. The inner wall void was filled with about 8 yards of cellular concrete and was filled through a small hole in the top of this dome. The doors and window are an EPS sandwich over tempered glass scrap pieces and reinforced in the middle and on the surface with fiberglass mesh and a high strength acrylic modified cement mix called Dryvit Primus. The door and windows are solid, light, slightly flexible, very insulating and easy to build.

Upper Right -- This illustrates several phases. You can see the electrical conduit mounted with-in the remesh block matrix. Mounting electrical and plumbing in this skeleton armature makes life easy for the electrition and plumber.

Middle and Bottom Left -- The armatures for these nesting pods and railings were sculpted from just expanded metal plaster lath. The concave shapes were done by cutting snips out of the square lath and then closing the gap with wire. Just made a pile of these dish shaped pieces of lath and put them together. The railing is just a crumpled piece of lath with fiber glass mesh on the top side but just in the tensil weak points.

Bottom Right -- This is what the armature looks like after the lath is sewed onto the remesh block armature.

Last additions - doug's Gallery
outside arch address.jpg
Archway entry2283 viewsThese Arches a very solid and easy to make. They are also hollow but get their extra rigidy because of their thickness.Jul 12, 2006
outside seashells.jpg
Sea Shell Windows Outside2513 viewsSeashell sculpture in windows on North East side to difuse indirect light into the upstairs room. Jul 12, 2006
House.jpg
Home2961 viewsThis is the stress-skin construction home I did in 2003. Jul 12, 2006
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Nicho3196 viewsThese Nicho's Provided stability but it should not be assumed that plastering the underside of these is quick and easy for a plaster crew. The topside portion of these details should be plastered by reaching inside the wall through an opening.Jul 12, 2006
park glass wall.jpg
Fluid Shape2828 viewsThis wall was filled with 25 tons of glass before the surface shells were applied. The nice distortions on the surface were caused by heavy glass getting stuck on the remesh blocks that were layed in laterally instead of vertically. The lateral blocks restricted the size of the openings for the glass to fall and the armature bowed outward under the weight because their were long horizontal runs that had no cross tension supports. All good though. This wall is now the focus of a big mural project.Jul 12, 2006
corner slope.jpg
Strong Corner2335 viewsThese shorter stretches of wall needed no exterior supports because of the supporting corner and short spans of straight wall.Jul 12, 2006
curve armature Jana yard.jpg
Curve Armature2626 viewsThese long Stress-Skin Curves are provide more stability over a longer stretch than sharp corners.Jul 12, 2006
bench butress clay stove.jpg
Bench Butress Supports2245 viewsThis bench and butress were designed to provide axel load reinforcing for the long straight walls to protect the wall from high winds.Jul 12, 2006