Beam Calculation Design
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Spacing if Joist
n/a
12"
16"
19.2"
24"
32"
48"
2x
4x
6x
8x
10x
12x
MinWidth
x4
x6
x8
x10
x12
x13.5
x15
x20
x24
MaxHeight
Left Cantilever
Bearing
Clear Span
Bearing
Right Cant.
TieIn
TieIn
Length
PSF
Load
Type
Duration
Start
End
plf End
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%
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%
40/10
40/15
60/10
60/15
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
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