The Forestry Forum is sponsored in part by:

iDRY Vacuum Kilns

Forestry Forum
Sponsored by:

TimberKing Sawmills

Toll Free 1-800-582-0470

LogRite Tools

Norwood Industries Inc.

Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money! sponsored by Northeast STIHL

Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades


Sawmill Exchange

Michigan Firewood, your BRUTE FORCE Authorized Dealer

Baker Products


iDRY Wood Lumber Vacuum Drying for everyon

Nyle Kiln Dry Systems

Chainsawr, The Worlds Largest Inventory of Chainsaw Parts

Author Topic: post/plate/tie joint  (Read 884 times)

0 Members and 1 Guest are viewing this topic.

Offline shackbuilder

  • member
  • *
  • Posts: 9
  • Location: Albany County, New York
  • Gender: Male
  • I'm new!
    • Share Post
post/plate/tie joint
« on: June 21, 2016, 11:00:33 AM »
Anyone aware of a joint that brings the tie up to the top of the post with the top plate beam, without using a jowled post?  This is for a common rafter setup that will be step lapped into the plate.  I was going to have the tie come into the post 1' down from the shoulder with a wedged half-dovetail in a thru mortise, but the building is 24' wide, and i am worried about thrust stressing this joint and the post top tenons.  Roof pitch will be 12/12. Should i be worried, or is collar ties on every rafter set enough to eliminate the thrust.   Closest thing i have found is this, but as i see it, it jams me from including my 1' overhang on the rafters -
  Thanks for any thoughts on this.

Offline Jim_Rogers

  • Board Moderator
  • *****
  • Posts: 7538
  • Age: 67
  • Location: Georgetown, MA
  • Gender: Male
  • Keep your chisels sharp.
    • Share Post
Re: post/plate/tie joint
« Reply #1 on: June 21, 2016, 11:35:35 AM »
One solution is to add a sprocket onto the side of the rafter to give you the overhang;



Hope that helps.

Jim Rogers
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline Roger Nair

  • Full Member x2
  • ***
  • Posts: 220
  • Age: 71
  • Location: Bakerton WVa
  • Gender: Male
  • I'm new!
    • Share Post
Re: post/plate/tie joint
« Reply #2 on: June 21, 2016, 11:55:22 AM »
To deal with the thrust issue, the simplest (to me) method is to avoid the collar related issues by having a post supported ridge, which will pickup one half of the roof load and place a substantial limit on thrust and ease stress on the tie joints.  Remember the thrust in a collar system is relentless and wood will deform and any weakness will be exposed in time.  A drive in the country will have on display many swaybacked, bulging buildings.
An optimist believes this is the best of all possible worlds, the pessimist fears that the optimist is correct.--James Branch Cabell

Offline shackbuilder

  • member
  • *
  • Posts: 9
  • Location: Albany County, New York
  • Gender: Male
  • I'm new!
    • Share Post
Re: post/plate/tie joint
« Reply #3 on: June 21, 2016, 12:23:40 PM »
Trying to keep the ridge open in a cupula area, so there will be two heavier rafter sets headered off to carry the three rafters in that area.

Offline Dave Shepard

  • Senior Member x2
  • *****
  • Posts: 11160
  • Age: 2015
  • Location: Alford Massachusetts
  • Gender: Male
  • Geometrically proportional
    • Share Post
    • My homepage
Re: post/plate/tie joint
« Reply #4 on: June 21, 2016, 03:45:40 PM »
Three way joints are tough, and more so if you don't use a jowled post and even more so with high thrust loads. Could you use a purlin plate to pick up the rafters mid span?
Wood-Mizer LT40HDD51-WR Wireless, Kubota L48, Honda Rincon 650, TJ208 G-S, and a 60"LogRite!

Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

Post to Plate joint

Started by bigshow on Timber Framing/Log construction

7 Replies
Last post June 05, 2007, 12:17:56 PM
by Jim_Rogers
Toughest post to plate joint?

Started by Satamax on Timber Framing/Log construction

2 Replies
Last post July 18, 2019, 03:28:23 AM
by Satamax
Tenon shoulder surface at post top to plate joint

Started by trouts2 on Timber Framing/Log construction

7 Replies
Last post September 18, 2018, 06:17:18 PM
by trouts2
Scarf Joint location in load bearing top plate

Started by Hackermatack on Timber Framing/Log construction

7 Replies
Last post January 15, 2016, 12:12:26 PM
by jimdad07

Powered by EzPortal