1. Floor Joists Cont.
4/13/10

2. 3rd type of Floor joist: Engineered
Engineered, human made, Glue Lams, Wood I beams == All mean about the same thing.
These are terms that refer to wood I beams that have been engineered to carry a structural load.
Pros: cheap, light, easy to place electrical and mechanicals later in the build.
Cons: no reputation, has only bee around for less than 15 years.

4. Engineered Joists Cont.
They are greener: If designed for your house.
Let me explain: You can buy these type joists from a big box store and cut to fit the result still works but not green.
If working with a aritect or lumber company: you build greener only using what you need.
Hayward's system
Different System Engineered floor systems
How to build a post WWII house
Leed Home Builders
Open joists

5. How to connect the joists to the girder.
About 3 standard ways are most common
Setting the joist right on top of the girder
Using a ledger on a girder
Not to common
Lots of work
Using a Joist Hanger

9. Joist Hangers
About years ago more and more constructions began using engineered support systems to connect parts of a house that where traditionally just nailed or a fixture was constructed. Now metal products that have been engineered are available to use. The joist hanger is one great example of this.

10. Bridging
Bridging is installed in rows between floor joists at intervals not exceeding 8 feet.
Purpose is to distribute concentrated load on the floor over a wider area.
Bridging also prevents the side to side movement of a joist.
Bridging can be wood or metal

11. Solid wood bridging
Solid wood bridging is typically the same size as the joists and is installed in an offset fashion to permit end nailing.

12. Wood cross Bridging Should be at least 1”x3” nominal lumber
It is placed in double rows that cross each other.

13. Framing an opening in a floor system

16. Insulating floor joists and Joist Pockets
New Green Way
Another view
Old fashion Fiberglass

17. Assignment
Thinking about your foundation that you have already drawn out. Using a piece of white paper draw out the perimeter of your foundation and lay out where the girder would be and where each floor joist would be placed do not forget stairway opening or other important parts of the floor joist system
On the back side of the paper in at least 2 paragraphs explain your design and also what type of girder and floor joists you plan on using, and explain why.