New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'table component',
});

styles.app.css

* {
  overflow-x: scroll;
}

body {
	font-family: sans-serif;
}

.wrapper { width: 700px; }

.container {
  background-color: white;
  width: 1024px;
  margin: 0 auto;
  
  height: 100vh;
  display: grid;
  grid-template-columns: 1fr 2fr 2fr 2fr;
  grid-template-rows: 100px 100px 100px 100px;

  overflow-x: scroll;
  overflow-y: scroll;
  
  position: relative;
}

.column {
  overflow: visible;
}

.column.frozen {
  background-color: yellow;
  grid-column: 1/1;
}

.cell {
	background-color: aqua;
  padding: 10px
}

templates.application.hbs

<div class="wrapper">
  <div class="container">
  	<div class="column frozen" data-column="1">
      <div class="cell" data-row="1">foo</div>
      <div class="cell" data-row="2">bar</div>
      <div class="cell" data-row="3">bill</div>
      <div class="cell" data-row="4">baz</div>
    </div>
    
  	<div class="column" data-column="2">
      <div class="cell" data-row="1">2,1</div>
      <div class="cell" data-row="2">2,2</div>
      <div class="cell" data-row="3">2,3</div>
      <div class="cell" data-row="4">2,4</div>
    </div>
    
  	<div class="column" data-column="3">
      <div class="cell" data-row="1">3,1</div>
      <div class="cell" data-row="2">3,2</div>
      <div class="cell" data-row="3">3,3</div>
      <div class="cell" data-row="4">3,4</div>
    </div>
    
  	<div class="column" data-column="4">
      <div class="cell" data-row="1">4,1</div>
      <div class="cell" data-row="2">4,2</div>
      <div class="cell" data-row="3">4,3</div>
      <div class="cell" data-row="4">4,4</div>
    </div>
  </div>
</div>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.11.3"
  }
}