Equipment platform ladder safety chains shall be and will be hooked only when someone is working on the platform.

设备平台梯上的安全链只有有人在平台上工作时应挂好。

youdao

If you have to climb up, use a firm platform or a sturdy ladder.

如果你必须爬上去，就用一个稳固的平台或者一个结实的梯子。

《柯林斯英汉双解大词典》

The single-room cabin had a place for storing things, called a loft, on a platform under the roof, which was reached by climbing a ladder.

这个只有一间房的木屋有个专门用来储藏东西的阁楼，可以爬梯子到屋顶下面的那块平台。

youdao

One engine was called initially, but crews requested an aerial ladder platform, which requires a support vehicle, it added.

BBC: Three crews sent to trapped gull in Norwich

The rescue took about 15 minutes once the aerial ladder platform arrived, and was over by about 15:45 GMT.

BBC: Three crews sent to trapped gull in Norwich

The city's aerial ladder platform would also be crewed on an on-call basis.

BBC: Devon and Somerset Fire Service facing ?5m budget cuts