I was approached by a client (ok my friends, Kathy and John. Hi, Kathy and John!) to build a custom built-in bench in their backyard. They were redoing their back patio and were inspired by the patio benches at The Oinkster, a fine local establishment near their house. It's such a cool place I don't know why The Oinkster doesn't put some actual pictures on their webpage.
The Oinkster:


The Oinkster Patio:

Don't you just want to sit there all afternoon? Can you tell I heart The Oinkster big time?
The Oinkster Patio Bench:

Sorry about the image quality! 3-year-old-phone-cam.
So this was the point of departure. Simple 2" x 2" tube steel posts supporting 2" x 3/8" steel flat bars, with wood slats for the seat and back. A simple diner patio, circa 1958 (just my guess.)
After doing some preliminary research, which in this case consisted of a pulled pork sandwich and fries, washed down with a draft Budweiser, enjoyed from inside looking out at the patio, since unfortunately it was raining that day, we met to discuss the project further. We considered different options and they settled on a relatively faithful recreation of the Oinkster bench, except for the flat bar being replaced with a 1" x 2" steel C-channel. I thought the channel would better hide the screws that would be used to hold the wood slats. I drew a quick CAD sketch, to check the proportions, etc.:

The back patio where this bench would be installed is a relatively narrow space behind the client's house, defined by a retaining wall running approximately parallel to the house, beyond which the hillside ascends steeply. Actually, the wall is not truly parallel to the house, it is set at an angle. This ultimately had a big influence on the design, as we shall see.
The original concept, as pictured above, was to make a simple, straight bench, parallel to the house, with a slightly wedge-shaped space leftover between the bench and wall, which would eventually fill in with plants trailing over the wall.
So off I went to Industrial Metal Supply, where they have huge racks of remnants, wherein one can usually find just what one needs for a small project such as this, and at a pretty good discount, since they're remnants. I usually stop by IMS if I'm even remotely nearby, just to have a quick look at what's in the remnant racks. Kathy met me there, as she works close by, and we had no trouble getting exactly what we needed for the bench (based on the sketch above.)
A few days later, after I had dialed in all the measurements and figured out my sequencing for putting it all together, just as I was about to start cutting metal, the phone rang. It was Kathy. "Have you started yet?"
"I was just about to," I answered.
"Oh, good. Don't start yet. We have a new idea. Come over Saturday morning for coffee and we'll discuss it."
"OMG, I love you but you are such a client," I answered. Since she's a designer too, I can tease her like this and not get fired.
Saturday came and I drove over to their place. Kathy explained that they had decided they wanted to keep the edge of the seat parallel to the house but have the back follow the angle of the wall. "It will be a wedge-shaped bench," she explained most enthusiastically, "a WENCH!" Kathy was always one of those people in architecture school whose projects had the cleverest names imaginable, to the constant envy of the rest of us.
So it was back to the drawing board. In addition to the wedge-shape, we decided it would be more interesting to mount the back directly to the block retaining wall, as opposed to supporting it off the seat. I came up with this drawing:
If you click to view the larger image it may take a moment to load, as it's about a megabyte.
They liked the new design, and I was excited about my detail for mounting the steel back supports to the wall so that there would not be any visible fasteners. Again, my quick CAD sketch:

Finally, I did a hand sketch to check the dimensions. Sometimes I work in CAD and sometimes I work by hand. Kind of interesting though, from a left-brain right-brain perspective, that for the math part and the real 'figuring it out' I'm hand sketching.
I built one of 4 bases and we looked at it on site. We decided to raise the height a little bit and proceed with the rest. Here are the base parts all cut out with the one completed base, which will need to be lengthened:

Finally the parts were all put together, powder coated (I use Pyramid Powder Coating in Sun Valley) and ready for installation. John and I spent the better part of a Saturday and got it 90% complete; he finished installing the final slats on the back the next day. Kathy and the kids helped too (did I mention the 2 kids and 2 cats? Theirs is a pretty lively household) and it was fun for the whole family. Here's Kathy posing with the bases, laid out and marked on the concrete. I think she had just finished mowing the yard:





I could have stopped right here. I really like the exposed back supports!



The wood is Ipe, a very hard wood similar to Teak, that is used a lot for outdoor applications these days. The Ipe isn't cheap, and because it came in 18-foot lengths, and the bench, um, I mean the Wench, is 15' long, there were 6 pieces left over, roughly 3' long each. Perfect for a couple of small tables. Since this has been a very long post, the tables will have to wait for a separate post.
Thanks for making it all the way to the end; I invite any questions or comments about this project.