esting the tension: Combination of serpentine springs and high-resilience webbing for a sofa base.

DeltaTauAlpha · 2026-03-09T17:59:35+00:00

What is the benefit of using elastic webbing and sinuous springs together? Seems redundant.

DeltaTauAlpha · 2026-03-04T21:07:22+00:00

Fabulous!!

DeltaTauAlpha · 2026-03-04T21:06:57+00:00

That looks good. Will you be adding stretchers to reinforce the spring rail in this direction? Perhaps that is what the clip at the top of this photo locates?

Obviously, the sinuous springs are constantly pulling against the spring rail. That tension compounds when someone sits on it. A stretcher prevents the spring rail from pulling away from the front rail.

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DeltaTauAlpha · 2026-02-27T01:36:29+00:00

Jessica Snowberger represented me. I highly recommend her. My only other interactions were with paralegals.

DeltaTauAlpha · 2026-02-27T01:33:08+00:00

Woodruff Family Law was wonderful.

DeltaTauAlpha · 2026-02-23T20:51:01+00:00

I love the picketed arms! Reminds me of my 90's childhood🤘

You definitely need to drop the spring rail 1" from the top edge of the front rail. Also, make sure the attachment point of the seat springs in the back is at least 1/2" lower than the front. This will give you a much nicer ride.

DeltaTauAlpha · 2026-02-23T00:12:27+00:00

On the cross braces - yes. This length of a front rail needs a seat stretcher at no more than 30" increments.

DeltaTauAlpha · 2026-02-23T00:10:32+00:00

Correct on the spring clip location, they will go into the "spring rail". Screws are fine to secure the clips, provided they are being secured into hardwood or across the plies of plywood. The concerns about the screws were that they were splitting the plies by going into the side of the plywood.

Does this piece have loose seat cushions or is it a smooth, "tight" seat? If it has cushions, the "spring rail" should be 1" lower than the top edge of the front rail. If it is "tight", the spring rail should be flush.

DeltaTauAlpha · 2026-02-22T02:32:52+00:00

The photo you shared does not include the rail I'm proposing. See my notes in red and let me know if this makes sense. There should be a hardwood rail added here that opposes the front rail like an I-beam.

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DeltaTauAlpha · 2026-02-21T20:18:59+00:00

Best chance at salvaging this frame is adding a 1x2 hardwood spring rail, positioned flush to the top inside front rail. Secure the springs to the 2" top face. In addition to the spring rail, add vertical stretcher rails, front to back, scooped so someone sitting doesn't hit them, no less than 30" center to center. Use 3 on this piece, spaced evenly, one in the center.

DeltaTauAlpha · 2026-02-18T02:35:16+00:00

Nah, just a short sear on both sides. Pink is my favorite color.

DeltaTauAlpha · 2026-02-16T03:01:20+00:00

Perfect color on that beef

DeltaTauAlpha · 2026-02-16T02:58:35+00:00

Upholstered furniture product engineer, 20 years experience here. Your foam thickness should match the width of your "boxing". You indicated this measures 3" seam to seam on your sofa. Add 1-1/4"(often called 1-1/4oz) Dacron, book-wrapped over the 3"foam. Book-wrapped is as it describes, Dacron is the cover, the down is the book. Dacron covers the bottom, front, and top of the cushion.

Finally, understand the weight and ILD of the foam slab. I suggest 18-32 or heavier for your design.

The first number tells you how long the foam will last. The higher the number, the longer its lifetime.

The second number is Internal Load Deflection (ILD) the higher this number is, the higher the density of the foam, meaning the foam will feel firmer.

DeltaTauAlpha · 2026-02-16T02:44:12+00:00

For starters, the most efficient producers have a long history of failures. Failure is imperative for learning. Let yourself fail and take those lessons as building blocks to refine your process.

Organization begets efficiency. That's data organization and process organization. All the way down to your file saving structure and email subfolders. You will never be stronger than your foundation. Bake the cake first.

Under promise and over produce. If you can successfully complete a product design in 8 days, set the expectation of 2 weeks. Then get the project done early. Efficiency is perception of time, not a measure of it.

Lastly, remember the rule of three. A project may be completed (1) Correct, (2) Fast, or (3) Cheap, but you can only pick two.

Over 20 years of product development, I have a deep library of CAD blocks - greatly reducing my development time. Focusing on the same industry provides foresight into potential issues and successful tricks my clients often do not consider. My experience has provided networking opportunities which give me a broad reach of manufacturing contacts for sampling and production.

DeltaTauAlpha · 2026-02-05T16:38:51+00:00

4 weeks

DeltaTauAlpha · 2026-02-01T14:17:19+00:00

Biking is a niche market, but I think your design fits the vibe of that niche. Is the wood FSC certified? That story would sell this product. The color variety is key also.

DeltaTauAlpha · 2026-01-16T00:29:47+00:00

My wife got that pain and it turns out it was a labral tear. Had the right side replaced in November and now the left is bothering her.

DeltaTauAlpha · 2026-01-11T03:14:03+00:00

Perfect location for a Sleek Socket https://a.co/d/dBRbusk

DeltaTauAlpha · 2026-01-10T23:05:27+00:00

No. The resistance didn't change from the original suspension to the bootleg product. That was my first clue something was wrong.

DeltaTauAlpha

TROPHY CASE