过去，国际建筑规范（IBC）要求所有出口门关闭时，加压楼梯井保持加压。美国的大多数司法管辖区都采用了2015年IBC，这可以解释为要求外门打开或关闭。在烟雾控制的早期，人们认为加压楼梯井的设计需要（1）在所有楼梯门关闭时保持加压，以及（2）在特定数量的楼梯门打开时保持加压。最近的研究改变了这种观点。2016年ASHRAE的一项研究项目（RP-1447）表明，如果消防楼层的楼梯门关闭，那么有许多打开的门的楼梯井中可以维持一个可维持的环境。泄漏到楼梯间的少量烟雾会被迅速稀释，从而在楼梯间内形成一个稳定的环境。 有一些楼梯间系统旨在通过特定数量的开门来维持增压，但许多这样的系统是复杂的。其中一个系统具有危险的故障模式。讨论了这些问题，包括建议的楼梯间增压系统。引用:2017年年度会议，加利福尼亚州长滩，会议论文

In the past, the International Building Code (IBC) has required pressurized stairwells to maintain pressurization with all exit doors closed. Most jurisdictions in the U.S. are adopting the 2015 IBC that can be interpreted as requiring exterior doors as opened or closed. In the early days of smoke control, it was thought that pressurized stairwells needed to be designed to (1) maintain pressurization with all stair doors closed, and (2) maintain pressurization with a specific number of stair doors opened. Recent research has changed this view. A 2016 ASHRAE research project (RP-1447) has shown that a tenable environment can be maintained in stairwells with many open doors provided that the stair door on the fire floor is closed. Small amounts of smoke that leak into the stairwell are quickly diluted resulting in a tenable environment in the stairwell. There are stairwell systems that are intended to maintain pressurization with a specific number of open doors, but many such systems are complex. One such system has dangerous failure modes. These issues are discussed including suggested stairwell pressurization systems.