Lengths of things that are usually joined (such as palm shingles, boards, poles for fruit-picker, etc.).
The roof of his house is five lengths of nipa.
The floor of his house is (as long as) two lengths of board.
How many lengths is your fruit-picker?
To add s.t.; to extend s.t. lengthwise (by adding to it); to add s.t. to what has been said.
Extend that clothesline so that it will be long.
He is there extending the rope of his carabao.
Magsugpat sorok iye duk ta'abutne lahing malangkewin.
He extended his fruit-picker so that he will be able to reach the tallest coconut palm.