A rack adapting device for an electronic equipment rack, the electronic equipment rack defining a housing section configured to house a plurality of first electronic equipment modules having a first module width, the electronic equipment rack comprising left and right equipment supports laterally spaced apart from one another by a rack housing width corresponding to the first module width, the housing section being defined between the left and right equipment supports, each of the left and right equipment supports comprising a plurality of rack mounting features for mounting the first electronic equipment modules between the left and right equipment supports, the rack adapting device being configured to adapt the electronic equipment rack to house a plurality of second electronic equipment modules each having a second module width, the second module width being less than the first module width, the rack adapting device comprising: an adapter body having a width dimensioned such that, when the rack adapting device is connected to the electronic equipment rack, the electronic equipment rack defines an adapted housing width corresponding to the second module width; a plurality of rack-engaging features connected to the adapter body and disposed on a first lateral side thereof, the rack-engaging features being configured to engage the rack mounting features of one of the left and right equipment supports of the electronic equipment rack to connect the rack adapting device to the one of the left and right equipment supports; and a plurality of adapter mounting features disposed on a second lateral side of the adapter body, the plurality of adapter mounting features being configured for mounting the plurality of the second electronic equipment modules to the rack adapting device such that, in use, the second electronic equipment modules are mounted between the rack adapting device and an other one of the left and right equipment supports of the electronic equipment rack, wherein: the adapter body comprises: a plurality of laterally-extending portions vertically spaced apart from one another, the rack-engaging features being connected to the laterally-extending portions; and a vertically-extending portion connected to the laterally-extending portions, the vertically-extending portion comprising the adapter mounting features; the vertically-extending portion has a front end and a rear end defining a length of the vertically-extending portion therebetween; and the length of the vertically-extending portion is configured to span a majority of a depth of the housing section. the rack adapting device being configured to adapt the electronic equipment rack to house a plurality of second electronic equipment modules each having a second module width, the second module width being less than the first module width, the rack adapting device comprising: an adapter body having a width dimensioned such that, when the rack adapting device is connected to the electronic equipment rack, the electronic equipment rack defines an adapted housing width corresponding to the second module width; a plurality of rack-engaging features connected to the adapter body and disposed on a first lateral side thereof, the rack-engaging features being configured to engage the rack mounting features of one of the left and right equipment supports of the electronic equipment rack to connect the rack adapting device to the one of the left and right equipment supports; and a plurality of adapter mounting features disposed on a second lateral side of the adapter body, the plurality of adapter mounting features being configured for mounting the plurality of the second electronic equipment modules to the rack adapting device such that, in use, the second electronic equipment modules are mounted between the rack adapting device and an other one of the left and right equipment supports of the electronic equipment rack, wherein: the adapter body comprises: a plurality of laterally-extending portions vertically spaced apart from one another, the rack-engaging features being connected to the laterally-extending portions; and a vertically-extending portion connected to the laterally-extending portions, the vertically-extending portion comprising the adapter mounting features; the vertically-extending portion has a front end and a rear end defining a length of the vertically-extending portion therebetween; and the length of the vertically-extending portion is configured to span a majority of a depth of the housing section. the adapter body comprises: a plurality of laterally-extending portions vertically spaced apart from one another, the rack-engaging features being connected to the laterally-extending portions; and a vertically-extending portion connected to the laterally-extending portions, the vertically-extending portion comprising the adapter mounting features; a plurality of laterally-extending portions vertically spaced apart from one another, the rack-engaging features being connected to the laterally-extending portions; and a vertically-extending portion connected to the laterally-extending portions, the vertically-extending portion comprising the adapter mounting features; the vertically-extending portion has a front end and a rear end defining a length of the vertically-extending portion therebetween; and the length of the vertically-extending portion is configured to span a majority of a depth of the housing section.