Seed Eco-Home 4 Calculations

Build Time

• Foundation - 40 hr foundation with grading. 20 hours without grading. 4 hour backhoe, 4 hour gravel, 4 hr rebar, 4 hr staking, 4 hr forms.
• Modules build - 132 hours for 122 modules total. 60 + 18 garage for 1300 sf model. 34 interior modules.
  • 10 windows at 2 hours. Rest is one hour average, easy. 112 hours + 20 hours. Including plumbing and electrical!. Total of 132 hours.
  • Data from [1] - 3 minutes per member, for 9 members - is a good conservative speed for a carpenter. Build time was 22 minutes with blocking + top/bottom available
  • Typical simple modules are 12 members, or 24 minutes
  • Windows are ~20 members - 60 minutes for frame.
• Joists - use helper tape premarked for joists. 3D printed blocking later - with recessed screw holes.
• Modules installation - 15 minutes per. See 1 Hour First Floor for data that says 6.3 minutes per team of 2, making it under 15 minutes per person. Thus the 15 minute estimate holds.

Devices

• Helper tape - premarked tape. $5. Green for first floor joists, red for second floor joists, blue for garage joists.
• Winch system
• Power Ladder system
• Bump nailer
• OSB as the Arbiter
• Hole saw set
• Socket set
• Interior modules - prepped with MEP

Installation - 15 Minutes Per Wall Module

About:

• This process relies on quality controlled modules which are flat to 1-2".
• OSB Master already guarantees edges to be square.
• Leaning in or out - corrected at the top plate-setting level with string line between 2 corners. Braces released in the middle

Process:

1. Clamp to bottom of next module.
2. Screw working module into base near bottom clamp.
3. Clamp to top of next module.
4. Suck in middle as needed. Use T25 screws.
5. Screw working module at other end - done.
6. Add brace for support. 2x4x8s for braces.
7. Bump nail it off once quality controlled for module correctness with fiducials and Pokayoke marking.