Which of the following describes ASTM Type II, Class 1 Cantilever Gate?

Which of the following describes ASTM Type II, Class 1 Cantilever Gate?

• A. Two support posts and four external rollers supporting the gate weight; guard if below 8 ft
• B. Two support posts and two internal roller sets inside a C-channel
• C. Single post with a solid panel and no rollers
• D. A vertical lift system with counterweights

Answer: (A)

The main idea is the way a Type II, Class 1 cantilever gate is built to support and guide its movement. In this arrangement, the gate is anchored at a pair of support posts at the operating end, and its weight is carried by four external rollers. Those rollers are placed on the outside of the gate frame to ride along a track, keeping the gate balanced and stable as it opens and closes. The standard also calls for a guard if the gate height is below eight feet to prevent someone from getting injured by the moving edge or from reaching under the gate. This configuration is what distinguishes a cantilever gate of this class from other designs. A setup with internal rollers inside a C-channel would be a different mechanism and isn’t the typical external-roller cantilever arrangement described here. A gate with a single post and no rollers wouldn’t have the required tracking and load distribution, so it wouldn’t meet the cantilever design standards. A vertical lift system with counterweights is a different type of gate operation altogether, not a cantilever sliding setup. So, two support posts plus four external rollers accurately describe the ASTM Type II, Class 1 cantilever gate, with the guard recommended for lower heights.

The main idea is the way a Type II, Class 1 cantilever gate is built to support and guide its movement. In this arrangement, the gate is anchored at a pair of support posts at the operating end, and its weight is carried by four external rollers. Those rollers are placed on the outside of the gate frame to ride along a track, keeping the gate balanced and stable as it opens and closes. The standard also calls for a guard if the gate height is below eight feet to prevent someone from getting injured by the moving edge or from reaching under the gate.

This configuration is what distinguishes a cantilever gate of this class from other designs. A setup with internal rollers inside a C-channel would be a different mechanism and isn’t the typical external-roller cantilever arrangement described here. A gate with a single post and no rollers wouldn’t have the required tracking and load distribution, so it wouldn’t meet the cantilever design standards. A vertical lift system with counterweights is a different type of gate operation altogether, not a cantilever sliding setup.

So, two support posts plus four external rollers accurately describe the ASTM Type II, Class 1 cantilever gate, with the guard recommended for lower heights.