Vertical alignment in tabular cells with variable height 4

Question

I am new in LaTeX. Could the headings of a LaTeX table to be set bottom aligned, and the other cells top aligned? This feature is important for the revisions according to my school standards, and I'm writing a template for any table.

I have set the horizontal alignment already. Constraints: The table could to extend by several pages (so, I am using longtable package). The footnotes must to be as the below image (adjacent to the last row, and in a line or runin, so I am using threeparttablex package). Height of rows variable (according to text length). Width of columns constant, different between each column. Wider column position is arbitrary. Compatible with spanish and french babel. Horizontal lines only for the first row (heading, top and bottom), and at the bottom of last row. It must to let use of multirow and multicolumn packages.

I have checked similar posts here and I have looked for several days in Internet, but I have not could to set the table.

Here, my code:

\documentclass[letterpaper,12pt, oneside]{report}
\usepackage[spanish,french]{babel}
\usepackage{longtable,tabularx,ltxtable}
\usepackage{titletoc}
\usepackage{booktabs}
\usepackage[para]{threeparttablex}
\usepackage{array,ragged2e}
\usepackage{rotating}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}} % left columns
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}} % centered columns
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}} % right columns
\begin{document}
\vspace{-1cm}
\begingroup
\linespread{1.3}
\begin{ThreePartTable}
\begin{longtable} {C{3.5cm}  L{4.5cm} L{6cm}}
\toprule
\Centering{Material Type} & \Centering{Uses} & \Centering{Technical \newline Recommendations} %
\\ \midrule
\endhead
\cmidrule{1-3}
\multicolumn{2}{r}{\textit{continued}}
\endfoot
\bottomrule
\insertTableNotes
\endlastfoot
Solid wood & Boards, moldings;\newline unfinished or preprimed & If budget permits, choose vertical-grain lumber of decay-resistant 
species.\newline Prime all faces and cut edges.\tnote{a} \\
Finger-jointed & Boards, moldings;\newline unfinished or preprimed & Prime all faces and cut edges. Maintain finish.\tnote{b}\\
\end{longtable}
\vspace{-1cm}
\footnotesize{
\begin{tablenotes}
\item[a] With grain
\item[b] Across grain
\end{tablenotes}
}
\end{ThreePartTable}
\endgroup
\end{document}

Excuse me by my English.

Answer 1

The simplest is to use the makecell package, which allows for a common formatting, control on the vertical and horizontal alignment and line breaks in certain cells with the theadand makecell commands:

\documentclass[letterpaper,12pt, oneside]{report}
\usepackage[spanish,french]{babel}
\usepackage{longtable,tabularx,ltxtable}
\usepackage{titletoc}
\usepackage{booktabs}
\usepackage[para]{threeparttablex}
\usepackage{array,ragged2e}
\usepackage{rotating}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}} % left columns
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}} % centered columns
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}} % right columns
\usepackage{makecell}
\renewcommand\theadalign{bc}
\renewcommand\theadfont{\normalsize}

\begin{document}
\vspace{-1cm}

\begingroup
\linespread{1.3}
\begin{ThreePartTable}
\begin{longtable} {C{3.5cm} L{4.5cm} L{6cm}}
\toprule
\thead{Material Type} & \thead{Uses} & \thead{Technical \\ Recommendations} %
\\ \midrule
\endhead
\cmidrule{1-3}
\multicolumn{2}{r}{\textit{continued}}
\endfoot
\bottomrule
\insertTableNotes
\endlastfoot
Solid wood & Boards, moldings;\newline unfinished or preprimed & If budget permits, choose vertical-grain lumber of decay-resistant
species.\newline Prime all faces and cut edges.\tnote{a} \\
Finger-jointed & Boards, moldings;\newline unfinished or preprimed & Prime all faces and cut edges. Maintain finish.\tnote{b}\\
\end{longtable}
\vspace{-1cm}
\footnotesize{
\begin{tablenotes}
\item[a] With grain
\item[b] Across grain
\end{tablenotes}
}
\end{ThreePartTable}
\endgroup

\end{document}