Door lock device

A method of locking a door with a door lock device, the method comprising:

• attaching a mount to one of the door or a structure surrounding the door, the mount comprising a mounting guide;
• mounting a lock arm assembly to the mount;
• and
• engaging an engagement assembly of the lock arm assembly with the other of the door or the structure surrounding the door to prevent the door from opening;
• wherein:
• the lock arm assembly comprises an attachment plate and a support member;
• the engagement assembly comprises an arm member;
• the support member couples the arm member to the attachment plate;
• the support member is oriented perpendicular to the attachment plate;
• one of the support member and the arm member defines an adjustment slot;
• the other of the support member and the arm member defines a fastener hole;
• an adjustment fastener extends through each of the adjustment slot and the fastener hole to couple the arm member to the support member;
• and
• the method further comprises sliding the adjustment fastener within the adjustment slot to reposition the arm member relative to the support member.