GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Anchor bolt o.c. spacing— earthquake retrofitting

user-7039450 | Posted in GBA Pro Help on

I am trying to order some Simpson retrofit foundation plates and can’t figure out what o.c. Stands for in the table that tells you anchor bolt size, diameter of screw

Here is the context:

Anchor bolt o.c. spacing

Also in the chart that tells you allowable loads DF/SP (160) there are two columns F1 and F2. Not sure what that stands for

Thank you so much!

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. Expert Member
    MALCOLM TAYLOR | | #1

    O.C. is "On Centre". It tells you the spacing of the bolts. So every two feet would be 2'-0" oc.

    DF is Douglas Fir. SP is Spruce-Pine

  2. GBA Editor
    Martin Holladay | | #2

    User-7039450,
    Malcolm is correct. In Canada, o.c. stands for "on centre."

    In the U.S., however, o.c. stands for "on center."

  3. GBA Editor
    Martin Holladay | | #3

    User-7039450,
    Below is an illustration that shows what F1 and F2 refer to.

    The illustration comes from this Simpson catalog page: "Retrofit Foundation Plates."

    .

  4. GBA Editor
    Martin Holladay | | #4

    User-7039450,
    You may want to read this Simpson guide: "Seismic Retrofit Guide."

    On page 18, you'll find the handy guide to abbreviations shown below. On page 17, you'll find a glossary.

    .

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |