Anchors....

Upon the event of a fall, most of the force is delivered to the anchor, which is basically a vector diagram, here are a couple of pictures to help you get the idea.

http://www.southeastclimbing.com/faq/faq_anchor_forces.htm

This is the only type of anchor I have ever used, and if you look closely, you will see that it is a very basic triangle, which divides the forces between them.

http://www.southeastclimbing.com/faq/faq_anchor_forces.htm

"The diagram shows the loads on each bolt with a 4.5 kN (1000 lb.) force applied. At low angles, 20 degrees or less, the bolts split the load. As the angle between the slings grows, the forces grow rapidly. If the bolts are spaced 2 feet apart, and we build our anchor using 2 foot slings, the angle is about 60 degrees. This raises the force on each bolt to 666 lbs."- (southeast climbing.com)

CONTENTS

Introduction
Commonly climbed rocks....
Climbing techniques....
Force generated by falling....
Anchors....

Bibliography