CUREE-Kajima Project

The Woodframe Project

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Projects : CUREE-Caltech Woodframe Project

Element 5 - Education & Outreach
Project Manager: Jill Andrews - Caltech (formerly with SCEC)

Appendix 5.1.6 - Subcontract 56


The Subcontractor (NorthRoad Builders) shall provide the following products:

Large models of building components: Half-scale models of components of a wood house.

All pieces to be half scale, i.e., approximately 1x2 studs for 2x4's. Wood members will be made of wood; concrete shall be simulated with a lightweight substitute with similar appearance. The following elements shall be included. Each should be able to stand alone and transported in one piece. No display case is intended for this exhibit so that people will be able to touch the model, and thus durability is important.

1A. One and 1/2 story shear will with hold-downs. This element shall include footing, slab-on-grade, sill plate, studs, anchor bolts, shear wall, hold-downs, stud wall beyond shear wall with window, upper floor joists with sills and flooring, part of wall above, stucco and interior drywall covering part of the surface. Shearwall sheathing to be oriented strand board (OSB) or plywood, with some technique for providing a cut-away view of the interior framing behind the sheathing. Suggested overall dimensions: 8 feet high by 6 feet long. Construction type: modern, code-conforming.

1B. Cripple wall showing various retrofit anchorage and bracing schemes. This element shall include footing, cripple wall with exterior stucco over part, and part of floor and wall above. Some technique for providing a cut-away view of the interior framing of behind the sheathing will be provided. Suggested overall dimensions: 1 to 2 feet high and 8 feet long. Various anchorage and bracing schemes shall be illustrated along the length.

1C. Anchorage of hill-side house. This element shall include a representation of sloping ground and reveal the wall on the uphill side of house as well as part of the floor and the floor-concrete foundation anchorage systems in that vicinity. Suggested length: 4 to 5 feet. Construction to illustrate both deficient and proper anchorage along the uphill wall.

Shearwall Tester.

This device is a sturdy steel box frame into which can be mounted a replaceable half scale shear panel (2 feet by 4 feet with vertical studs and top and bottom sills). Shear panel is mounted on permanent anchor bolts extending from the bottom of the frame, with accommodation for hold-downs. Screw jacks mounted at the top of the frame apply horizontal forces to the top sill; one screw jack pushes right and one pushes left. Displacement capability to be 6 inches in each direction. Frame should be designed to remain stable while screw jacks are being turned. A load cell will be mounted at the top of the frame and give a visible readout of the force applied to the wall.

Appropriate force capability and amount of jack leverage are responsibilities of the contractor. Tester should be able to be operated by a 12 year old child. Alternative designs will also be considered.

Schedule: Subcontractor will produce preliminary drawings or draft mock-up by December 1, 2000.

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last updated 03.27.15