Latest revision as of 03:39, 13 July 2025

PJI90 - 16" - $11/foot = $350/32 feet.
Menards - 16" at $134 65 series [1]. 28' span for 40 psf live 10 dead, with 16 OC. 130 lb for 32', 100 lb for 24'
Design guide - [2]. Chat tells me 90 series is also 7/16" web. [3]
- And - flanges are only 1.5" tall and 1.75" wide for the PJI-90 series truss. That means that a 2x4 on the top and bottom is actually stronger [4]

Weight

16" deep truss - For 7/16" OSB at 45 lb/sheet - we need 1.66 times sheet including bonding plates. Takes us to 151.5 lb per truss.
12" deep truss - For 7/16" OSB at 45 lb/sheet - we need 1 = 45 lb in OSB, and 8*9.6=76.8+45+4.5 total of 128 lb for 32' including bonding plates.

34 span for 16" deep I joist (80 series) at 12" OC spacing. [5]
- This is needed for 32' space.
P3 Series 80 joist - all it says for P3 is that they are '3/8" web or greater'
P3 80 series is 7/16" web [6]

@@ Line 1: / Line 1: @@
+*PJI90 - 16" - $11/foot = $350/32 feet.
 *Menards - 16" at $134 65 series [https://www.menards.com/main/building-materials/trusses-i-joists-engineered-lumber/i-joists-rim-boards/3-1-2-x-16-i-joist-65-series/pji651632/p-1642874354850390-c-5662.htm]. 28' span for 40 psf live 10 dead, with 16 OC. 130 lb for 32', 100 lb for 24'
 *Design guide - [https://cdn.menardc.com/main/items/media/INTER078/Install_Instruct/04-P3-Joist-Installation-Guide-US.pdf]. Chat tells me 90 series is also 7/16" web. [https://chatgpt.com/share/68474287-428c-8010-bff0-231b62b62be2]
+**And - flanges are only 1.5" tall and 1.75" wide for the PJI-90 series truss. That means that a 2x4 on the top and bottom is actually stronger [https://chatgpt.com/c/6847424e-0030-8010-aa5c-f56e0be563fb]
 =Weight=
 *16" deep truss - For 7/16" OSB at 45 lb/sheet - we need 1.66 times sheet including bonding plates. Takes us to 151.5 lb per truss.
@@ Line 15: / Line 16: @@
 =OSE=
 *Modified [[Truss]]: see design doc [https://docs.google.com/presentation/d/1ULq15Dxa2cPn6gd_Hll4B4Ek0JPToyqJRwYobZZbrwU/edit#slide=id.g30f284b56ad_6_34]
+*[[Truss Design]]