Beam Calculations
Spacing if Joist
n/a
12"
16"
19.2"
24"
32"
48"
2x4
2x6
2x8
2x10
2x12
Min
2x4
2x6
2x8
2x10
2x12
3-1/8x
5-1/8x
6-3/4x
8-3/4x
x15
x20
8-3/4x24
Max
Left Cantilever
Clear Span
Right Cant.
brg
brg
TieIn
TieIn
Length
PSF
Load
Type
Duration
Start
End
plf End
16/14
16/10
16/7
20/14
20/10
20/7
25/14
25/10
25/7
40/14
60/14
80/14
100/14
PSF joist
PLF
LBS
Roof 25%
Roof 15%
Floor 0%
16/14
16/10
16/7
20/14
20/10
20/7
25/14
25/10
25/7
40/14
60/14
80/14
100/14
PSF joist
PLF
LBS
Roof 25%
Roof 15%
Floor 0%
16/14
16/10
16/7
20/14
20/10
20/7
25/14
25/10
25/7
40/14
60/14
80/14
100/14
PSF joist
PLF
LBS
Roof 25%
Roof 15%
Floor 0%
1.
2.
3.
4.
Enter clear-span and if cantilevers
Enter Tie-In length with PSF or;
Enter concentrated LBS or PLF
For joists enter LL/DL PSF load
Dimension Lumber
ESP
HF
SPF
DF
SYP
Glu-Lam
DF
SYP
Para-Lam
TJI
BCI
Mail wet-seals to:
Street
City
State
ZipCode
Engineering seal:
AK
AZ
CA
OR
NV
WA
Tru-Truss Engineering
TrussCalc