Is there an array that can be changed in archicad?

[LeeJaeYoung]

Spacing and number are possible.

You can also check the number in the schedule.

[Barry Kelly]

An array for what exactly?

Do you want to show/adjust the spacing in the schedule?

That is not possible, unless all of those beams are actually one object with a parameter that controls the spacing.

If they are separate beams, then there is nothing you can do to schedule the spacing.

Barry.

[Lingwisyer]

If you know your total length, you could use the Edit => Distribute function. Then if you group the objects, you could then move the end ones to modify to total length and redistribute.