English to Polish Tech/Engineering Construction / Civil Engineering drewniane elementy konstrukcyjne

"Legar I", "legar w kształcie litery I", ...
Kontekst:

Timber structural members play an important part in the construction of building structures. Timber is
commonly used for joists, beams, columns, rafters and frames because of its strengths for load bearing and its
natural ability to withstand a variety of forces. Additionally, compared to metal based materials, timber structural
members often cost less to manufacture and are more easily cut and processed for specific building requirements.
A strong and useful type of structural member is an "I-joist". The I-joist comprises two flange members
with an interconnecting web member, resembling a letter "I" in its cross-section. I-joists have good load bearing
and distribution capabilities and are key components in building construction.

nr op. pate.: EP 2 252 747 B1