Table:
0
A
B
C
D
E
F
1
Length feet (m)
Width feet (m)
Load short tons (MT)
Truss type(s)
Year built
Source (Year)
2
feet (m)
feet 6inches (m)
short tons (t)
Queen post
1878
Landis (1966)
3
feet 2inches (m)
feet 5inches (m)
short tons (t)
Wood or Timber
Pre-1900
NBI (2009)
4
feet (m)
feet 5inches (m)
short tons (t)
Multiple kingpost and queenpost Burr arch
1898
NRHP (1980)
5
feet 4inches (m)
feet 8.5inches (m)
NA
Queenpost with kingpost
1898
Evans (2001)
6
feet (m)
feet 5inches (m)
NA
Burr
1898
Zacher (1994)

Questions and formulas:
Question: What is the width feet in meeters for the truss with a source of nbi (2009)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="nbi (2009)"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,F2:F6="nbi (2009)"),2))
Level: medium
Question: What is the width for hte truss with a source of zacher (1994)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="zacher (1994)"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,F2:F6="zacher (1994)"),2))
Level: medium