The - Standard - Ronard mounts are Heavy Duty.
And Ronard has mounts that go way beyond Heavy Duty
Here is a , No guy wires , Light Weight , Aluminum , Lay Over Tower , Do antenna installation and adjustments standing on the ground.
http://www.palcoelectronics.com/pe300.aspx.
3 Star has many types and kinds of antenna mounts.
http://www.3starinc.com