Close Quarter Battle Articles.


Part One: The Anatomy of the Room

Anatomy is a branch of science concerned with the structure of living organisms. When we look at the structure of a room there is not really a whole lot to see. That is until you begin to imagine it from the eyes of a soldier or police officer. Room structure dictates the way one may enter and clear the room. This article will look to break down the room into critical segments and describe their tactical significance, giving the reader a unique look into what rooms are to someone working within a tactical environment. The anatomy of a room.

Part 1

Let’s start off with some simple concepts. The first concept we will examine differentiates the placement of an opening to the room. One opening is found in, or closest to, the center of a room and one opening is found on the corner of a room. One is a center-fed room and the other is a corner-fed room. An opening can be anything from an artificial hole created by an explosive or other means, a doorway or a window. As long as you can fit in it and make it into the entrypoint, it’s gold. That opening is typically the first vision of what could be inside the room.

Above: Center-fed versus Corner-fed Rooms.
Above: Center-fed versus Corner-fed Rooms.

Now you may be wondering – what difference does this make? As we slowly expand into more concepts they will interconnect and you will see that simple delineations lead to a clearer understanding of the tactical environment. In fact, they can be the difference between life and death as I will demonstrate to you later in this series.

So, what next? Now we have the door or opening placement worked out let’s look at the type of rooms you may encounter. For simplicities sake we will examine three simple structures: the box-shaped room, the linear room and the L-shaped room. I will also briefly touch on the complex nature of irregular rooms.

Box Shaped RoomThe box-shaped room can be simply called a box room. It is usually a square-shaped room with four corners. This is the most common type of room we encounter within tactical training environments. In real life, however, there are many irregular shapes and oddities that become apparent when clearing rooms. These are deemed irregular rooms.Linear RoomA linear room is an elongated point to any building. This is usually a hallway, tunnel or other elongated area. It is a decisively fatal layout. You may think an area that is straight and long is easy to clear but it is not. There are usually many follow-on rooms spanning off a linear room, as often it acts as central architecture to a building. This creates oversight and neglect for many exposing angles you meet as you progress through this area. If a firefight occurs here, it is almost a one-on-one or one-on-two gun battle decided by who “wins the angle” and engages first. They are often known as Linear Danger Areas for this reason.

An L-shaped room is, as the name states, in the shape of the “L” alphabetical letter. It can be imagined as a box room with a rectangular room projecting from it moving towards the right or left directions. This essentially means that one area of the room is cleared initially and the other area of the room – usually the rectangular area – is cleared secondary to that. This is often because the secondary area is not seen from the primary area on initial entry. There is an elongated piece of terrain that still remains unclear. Taking this requires different tactics and techniques.

L-Shaped RoomNow do note that there are many more room layouts out there. For simplicities sake yet again, refer to rooms that are non-descriptive as irregular rooms and then, if you can, begin to describe that room to the best of your ability. Irregular rooms follow no pattern, there is no rhyme or reason to their shape or structure. They are simply odd. These in the past, for example, have included rooms within large Mosques, Shrines, Government buildings, multi-room basements, tunnels and other “jury-rigged” barricaded areas of an occupied space.

To further discuss room layout we must discuss the heavy versus weak sides of the room. The heavy side of the room is the biggest area of the room from the door. The weak side of the room is smallest area of the room from the door.

For example in a corner-fed room that projects or “feeds” towards the right side, it can be broken down into being “heavier” towards the right than the left. Thus being heavy right and weak left. Essentially what you are saying is that the right side has more area to clear. This may sway your decision making processes to clearing towards the right initially rather than going left.

So when someone tells you that you must always “clear left first” as pointman, they’re not always giving you sound advice. I will discuss more of the dogma of Close Quarters Battle in further episodes.

*We’re pleased if your website uses our Anatomy of a Room images but please credit us by using a hyperlink to Spotter Up or by not cutting off our watermark from the images we created. Please do not read too much into the weapons position of the shooters in the illustrations; they were an afterthough added on to the room diagrams to make it look more interesting.

Part 2 coming soon!

By Rye

Close Quarters Battle
Tactical Education and Motivation
Google anything Close Quarter Battle – You’ll find us!


By Rye

Some crazy British-Australian twit. CQB nut and member of CQB-TEAM.

3 thoughts on “Anatomy of the Room Part 1”
  1. Thank you very much.Your information is useful in many ways. confused person in the direction of clearing the room

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.