Masonry: a CMU lintel

Transcript

Masonry: a CMU lintel.

Start

Masonry types are under the Masonry tab of the wizard. Pick the masonry lintel.

The inputs

Here is an 8 inch CMU lintel, two courses deep, over an 8 foot opening, with two number 5 bars at the bottom, embedded 32 inches past the opening. The applied loads are 400 pounds per foot dead and 300 roof live, with the wall above and its self-weight.

Two number 5 bars

The status is Not adequate, but not for strength. The failing check is the bottom bar embedment: 38.9 inches needed, 32 provided, a ratio of 1.217. This is why you read the rows.

Two number 4 bars

Change the bars to two number 4, and the lintel is adequate. The effective span is 8.67 feet, and the factored reaction at each end is 6.3 kips. Take that to the bearing below.

Reading a check

Flexure needs 13.7 kip-feet, and has 21. Open the row to read each equation with its clause.

The code basis

A plain word on the code basis. TMS 402-22 itself is not on hand. These types are built on TMS 402-13 wording and the TMS cross-reference. A reference marked, to confirm against the code text, is not yet confirmed against the 2022 text, so read that clause yourself.

Report and sheet

Then print the report, with every check, its equations and its clauses. Print the drawing sheet on your own title block, at the size you choose. Or export the same sheet as a DXF for your CAD software.

Questions? Select Support in the app, or write to us at services@ilxstudio.com.