Base Member Line (BSMB) ( Modeling & Drawing Editor )

Tool summary :

  • BSMB stands for "Base Member Line." It lets you base one or more construction lines off the member line that you snap to.
  • After invoking Construction Line Add , select BSMB and snap to the member line that you want, then left-click ( Locate ). You then make entries on the Base Member window to specify the number, spacing and direction of the construction lines that will be drawn parallell to the member line you located.
  • BSMB can be used in Modeling or to base off a member line in an erection view in the Drawing Editor .
  • See BSMB instead of point location and BSMB instead of second point location and the Base Member window .

Also see :

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   BSMB instead of point location :

The member can be displayed in a stick or solid form. The following instructions assume that you are using a 3-button mouse.

1 . Invoke Construction Line Add . Select BSMB as the Locate option.
2 . Place the mouse pointer ( ) near the member you want to base off of. When the member line is highlighted, left-click ( Locate ).
3 . On the Base Member window, enter the distance from the member and a repeat factor, then press " Add ."
4 . Construction Line Add generates construction lines that are spaced the distance that you specified from the member and from one another.
5 . Press " Exit " or base new construction lines off of the last one that was added.

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   BSMB instead of second point location :

When BSMB is used instead of locating a second point during Construction Line Add , a construction line is drawn through the first point, parallel to the member line of the member that you locate. The member may be displayed in a stick or solid form. The following instructions assume that you are using a 3-button mouse and that the User and Site Options > General > " Point location target " is set to ' Fancy ' ( ).

1 . Invoke Construction Line Add .
2 . Left-click ( Locate ) when the target ( ) snaps to the first point. INCL is the Locate option used in this example.
3 . Select BSMB as the Locate option. Place the mouse pointer ( ) so that it highlights a nearby member, then left-click ( Locate ).
4 . Construction Line Add draws a construction line through the first point, parallel to the member located in step 3.

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   The Base Member window (click here for step-by-step instructions) :

The Base Member window opens when the Locate option BSMB is selected and you have left-clicked ( Locate ) after highlighting the member to base off of.

Dimension from member: The positive or negative distance (in the primary dimension " Units " or other units ) that you want the first construction line you are adding to be from the member line you are basing off of. This distance is also the distance between each adjacent pair of the new construction lines if you entered a " Repeat factor ." A negative sign (-) adds the new construction lines in a negative direction if you use the " Add " button (or use the " Add + " or " Add - " buttons to set the direction).

Repeat factor: The number ( 1 or 2 or 3 ...) of construction lines that you want to be added when you press the " Add " or " Add - " or " Add + " button. For the " Add +/- " button, this is the number of pairs of construction lines that will be added.

Lock base position: or . For the first set of construction lines added using BSMB , the base position is the member originally selected to base off of. If this box is not checked ( ), the base position becomes the last construction line you added if you added that construction line using " Add " or " Add + " or " Add - ." Adding one or more pairs of construction lines using " Add +/- " does not change the base position. If this box is checked ( ), the base position remains the same the next time you press the " Add " or " Add + " or " Add - " button.

Pen color: The button that is pressed sets the on-screen display color of the construction line(s) that will be added when you press one of the " Add ... " buttons.

User and Site Options > General > " Default color " sets the button that is selected when this window first opens.

"Add" places the " Repeat factor " number of construction lines at distances from one another that are equal to the " Dimension from member ." For vertical construction lines, a positive " Dimension from member " places the new construction lines to the right of the line being based off of; a negative distance places them to the left. For horizontal construction lines, a positive distance places the new lines above the line being based off of; a negative dimension places them below. The line being based off of is either the member line you selected in step 3, or the last newly added construction line (unless you checked the box for " Lock base position ").

"Add -" places construction lines the " Dimension from member " to the left or below the line being based off (the member line that you highlighted or the last-added construction line).

"Add +" is the same as " Add - ," except that the construction lines are placed to the right or above the line being based off of.

"Add+/-" places one or more pairs of construction lines. It adds one pair if the " Repeat factor " is ' 1 ', two pairs if the " Repeat factor " is ' 2 '. The spacing is the " Dimension from member ." The base position remains the same when you press " Add +/- ." When you press " Add " or " Add+ " or " Add- ," the base position is the last-added construction line (unless " Lock base position " is checked).

"Exit" closes the Base Member window. Construction Line Add continues to be active until you right-click ( Return ).

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