The local building requirements to secure medical equipment in seismically active areas in the United States are based on recommendations of the American Society of Civil Engineers. In our institution we have recently acquired new linear accelerators, one of which had to be installed in an existing vault and one in a new vault. Since we are in a seismic active area, changes in the local code required us to start placing the new linacs seismically stable. Here, we describe the necessary steps taken to ensure a seismically sound installation of our linacs. For the linac installation to be seismically stable, the linac base frame has to be seismically fixed into the vault floor. The installation of a new linac into an existing vault requires verification of a structurally sound base frame. Knowledge of the previously applied fixation of such is needed and exploratory removal of grouted floor helped in the verification. Understanding the additional load requirements for the locality allows to account for the existing fixation and can potentially reduce the work needed to achieve seismic fixation requirements. For a prospective seismic installation the new linac base frame can be directly installed with the necessary strength. In addition the actual workflow is straight forward and vendor recommendations can be used. In both cases the vendor provided seismic calculations serve as baseline from which a facility should be work from. It is the facilities task to verify the correct installation of a linac in their specific location. An understanding of the seismic landscape can facilitate an appropriate installation at minimal additional cost.

中文翻译：

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直线加速器装置的抗震加固

在美国地震活跃地区中用于保护医疗设备的当地建筑要求基于美国土木工程师协会的建议。在我们的机构中​​，我们最近购买了新的线性加速器，其中之一必须安装在现有库中，而另一则必须安装在新库中。由于我们位于地震活跃地区，因此当地法规的变更要求我们开始将新的直线加速器置于地震稳定的位置。在这里，我们描述了为确保直线加速器的抗震安装所采取的必要步骤。为了使直线加速器安装在地震方面稳定，直线加速器基础框架必须通过地震方式固定在保险库地板中。在现有的保险库中安装新的直线加速器需要验证结构合理的基础框架。需要了解以前使用的固定方法，并尝试性地去除灌浆地板，有助于进行验证。了解该位置的额外负载要求可以解决现有的固定问题，并且可以潜在地减少实现地震固定要求所需的工作。对于预期的地震安装，可以以所需的强度直接安装新的直线加速器基础框架。另外，实际的工作流程很简单，可以使用供应商的建议。在这两种情况下，供应商提供的地震计算均作为应从中使用设施的基准。验证直线加速器在其特定位置的正确安装是设施任务。