There are two string parts in a piece I’m writing that use divisi, and I’m not sure how to write them correctly.

First, this violin section:

I want to make clear that all players should play sul pont. but that only half of them also play tremolo. Is the way I’ve instructed it correct? I added “ord.” to try and distinguish it from the trem. marking beneath, but I’m not sure it’s used correctly here.

Second, this split viola section:

The intention is to split the violas in three sections, have sections 2+3 play the staccatos, and have section 1 come in with the melody several bars later. Is this notated correctly?

UPDATE: I’ve changed the second example to the following:

Is this better?

There are two string parts in a piece I’m writing that use divisi, and I’m not sure how to write them correctly.

First, this violin section:

I want to make clear that all players should play sul pont. but that only half of them also play tremolo. Is the way I’ve instructed it correct? I added “ord.” to try and distinguish it from the trem. marking beneath, but I’m not sure it’s used correctly here.

Second, this split viola section:

The intention is to split the violas in three sections, have sections 2+3 play the staccatos, and have section 1 come in with the melody several bars later. Is this notated correctly?

UPDATE: I’ve changed the second example to the following:

(In the previous version I envisioned the violas (12 players) split into three coequal sections (4 each), but I’ve decided it’s better to keep half playing the melody (since it should stand out more) and the other half re-split for the staccatos (3 each).)

Is this better?

There are two string parts in a piece I’m writing that use divisi, and I’m not sure how to write them correctly.

First, this violin section:

I want to make clear that all players should play sul pont. but that only half of them also play tremolo. Is the way I’ve instructed it correct? I added “ord.” to try and distinguish it from the trem. marking beneath, but I’m not sure it’s used correctly here.

Second, this split viola section:

The intention is to split the violas in three sections, have sections 2+3 play the staccatos, and have section 1 come in with the melody several bars later. Is this notated correctly?

There are two string parts in a piece I’m writing that use divisi, and I’m not sure how to write them correctly.

First, this violin section:

I want to make clear that all players should play sul pont. but that only half of them also play tremolo. Is the way I’ve instructed it correct? I added “ord.” to try and distinguish it from the trem. marking beneath, but I’m not sure it’s used correctly here.

Second, this split viola section:

The intention is to split the violas in three sections, have sections 2+3 play the staccatos, and have section 1 come in with the melody several bars later. Is this notated correctly?

UPDATE: I’ve changed the second example to the following:

Is this better?